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Publication numberUS1774536 A
Publication typeGrant
Publication dateSep 2, 1930
Filing dateNov 6, 1926
Priority dateNov 6, 1925
Publication numberUS 1774536 A, US 1774536A, US-A-1774536, US1774536 A, US1774536A
InventorsWinkler Alfred, Dunnebier Max
Original AssigneeWinkler Alfred, Dunnebier Max
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Process and arrangement for manufacturing open-end and open-side envelopes from paper or similar material
US 1774536 A
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Description  (OCR text may contain errors)

l Sept. 2, 1930. A, WINKLER El' AL PROCESS AND ARRANGEMENT FOR MANUFACTURING OPEN END AND OPEN sInEENvELoPEs FROM PAPER 0R SIMILAR MATERIAL 5 Sheets-Sheet .Filed Nov. 6. 1926 INVENToIg.

Sept.' 2, 1930. A W|NK| ER ET AL 1,774,536

PROCESS AND ARRANGEMENT FOR MANUFACTURING OPEN END AND OPEN SIDE ENVELOPES FROM PAPER OR SIMILAR MATERIAL FledNov. 6, 1926 5 Sheets-Sheet 2 Sept. 2, 1930. A, W|NKLEREV AL 1,774,536

PROCESS AND ARRANGEMENT FOR MANUFACTURING OPEN END', AND

QPEN SIDE ENVELOPES FROM FAPER 0R SIMILAR MATERIAL Filed Nov. 5, 1926 5 Sheets-Sheet 3 Max Hannah/'ar A TTORNE YS.

Sept. 2, 1930. A, wlNKLER ll'V AL 1,774,536

1 PROCESS AND ARRANGEMENT FOR MANUFACTURING OPEN END AND OPEN SIDE ENvELoPEs FROM PAPER 0R SIMILAR MATERIAL Filed NGV. 6. 1926 5 sheets-sheet' 4 TORNEYS.

Sept. 2, 1930. A. wlNKLl-:R ET AL 1,774,536

PROCESS AND ARRANGEMENT FOR MANUFACTURING OPEN END AND OPEN SIDE ENVELOPES FROM PAPER OR SIMILAR MATERIAL Filed Nov. 6, 1926 5 Sheets-Sheet 5 f4 H fred /n/f/ef' BY A AT'TORNEYS.'

Patented Sept. 2, 1930 UNITED STATES PATENT OFFICE PROCESS AND ABRANGEMENT FOR MANUFACTURING OPEN-END AND OPEN-SEE N- 'VELOPES FROM PAPER Clitl SIMILAR MATERIAL Application iiled November 6, 1926, Serial No. 146,837, and in Germany November 8, 1925.

Our invention relates t6 envelope making machines and more particularly to a ma'- chine of the rotary type for making open end envelopes; the principal objectyof the invention being to reduce the dimensions of machines of this type by advantageous arrangement of the working parts, including mechanism for initially folding the blanks to reducethe spacing between successive operations.

By reason of our improvement we are able to increase factory capacity by installation of a greater number of machines in a given floor space and to increase the capacity of individual machines because of the closer spacline adjacent the left hand side of the ma-` chine. p

Fig. 2 is an enlarged longitudinal vertical section ofthe stack table and initial folding scoring, gumming and sealing rolls.

Fig. 3 is an enlarged detail elevation of the initial folding mechanism.

Fig. 4 is a plan view of the stack table illustrating a' stack of blanks thereon.

Fig. 5 is an enlarged front elevation of the set of initial scoring, gumming,` and sealing rolls.

Fig. 6 is an enlarged plan view 0f the secondary set of rolls.

Fig. 7 is an enlarged cross section on the line 7 -7, Fig. 6, particularly illustrating the end Hap-forming mechanism.

Figs. 8 to 14 are plan views illustrating the various steps of forming the blank into an envelope: Fig. 8 illustrates the virgin blank, Fig. 9 the initial fold and scorin for the second fold, Fig. 10 gumming of theack Hap, Fig. 11 sealingA of the back flap and projected into the frame to anchor the arms 4the frame bed plate, back of the transverse scoring of the bottom flap, Fig. 12 folding ofthe end flaps, Fig. 13 umming of the botfom flap, and Fig. 14 t e completed enve- .Ope-

Referring more in detail to the drawings:

1 and 2 designate right and left side frame standardssupporting horizontal bed plates 3 and 4 which extend rearwardly from the standards and have upward front extensions 5 and 6. Mounted on the extensions 5 and 6 is a table 7 having slots 8 and supported on said table is a skeleton. frame 9 adjustably anchored to the ytable by bolts 10 which exltend through the slots 8 and through arcuate slots 1,1 in the frame; the bolts having heads 12 engageable with the under side of the table and 'nuts 13 engageable with the top ofthe frame so that when the bolts are loosened thel frame may be moved to adjusted positionv and when the bolts are tightened, the frame is held rigidly in place. y

15 designates stack guides mounted on, arms 16 which overlie the frame 9 and have slots 17 through which. cap screws 18 are in adjusted position. It is apparent that with this arrangement stacks of blanks of different contour and dimension may be centered on the table.

"The table 7 is provided-with a central, transverse opening 19 through which blanks from the stack may be drawn into the operatin mechanism.

ounted on the upward extensions 5, 6 of center of the opening 19 is a shaft 20and forward of the opening are stub shafts 2l. Fixed on leach end of the shaft 20 is an upwardly and forwardly directed arm 22 having a horizontal, forwardly opening U-shaped socket 23 and fixed on each stub shaft 21 are upwardly and rearwardly directed arms 24 having lateral studs 25 provided with rollers 26 which seat in the socket 23 to form a toggle joint between the arms 22\and 24.

Journaled on studs 27 on the extensions 5 and 6 adjacent the shaft 21 are bell crank levers 28, one end of each of which isfixed to the shafts 21 and connected with the other arm of each of said levers is a spring 29 im anchored to the frame to yieldingly rotate the bell crank lever to swing the shafts 21 in an arc as presently described. Also fixed to the shaft 20 is an arm 30 having a slot 31 in which is adjustably anchored the bolt 32 of a pitman 33 receiving reciprocatory movement from a cam 34 on the main shaft 35 through a lever 36 pivotally mounted on the stud 37 on the adjacent frame standard and having a slot 38 within which the bolt 39 on the pitman is adjustably mounted, the lever 36 having a roller 40 to provide anti-friction bearing with the periphery of the cam. The cam 34 is of the jump-off type providing for quick return of the parts of the toggle levers 22 and 24 under influence of the spring 29.

Mounted on the paired arms 22 and 24 and extending transversely across the machine beneath the center of the table opening 19 are shafts 41, 42 carrying friction rollers 43 and 44 held in yielding contact by the action of spring 29, the shaft 42 being at slightly greater elevation than the shaft 41 and the rollers beinglof the same diameter so that when the toggle levers are rocked against the tension of spring 29 upon operation of the pitman, the roller '44 rises into contact with the forward part of the bottom blank of a stack on the table and the rollers being constantly rotating in a downwardly feeding direction, through mechanism presently described, the roller 44 will, when it engages the forward part of the bottom blank in the stack, push such part rearwardly beneath the stack. Weight of the stack preventing displacement of the bottom blank along the table, a downward fold is formed in the blank and the folded blank, being projected be tween the rotating rollers, is pulled downwardly between the rollers, thereby folding the blank to form front and backflaps for an envelope, later formed in the machine.

riihe stack is so adjusted on the table that the front flap is of less width than the rear flap to leave a sealing Hap on the blank. (Figs. 8 to 14.)

In order to adjust the stack to vary pressure of the blanks on the feeding roller, we mount auxiliary table plates 45 and 46 in the opening 19. These plates are pivotally mounted by arms 47 and 48' on transverse shafts 49 and 50 j ournaled in the sides of the frame extensions 5 and 6 so that when the shafts are rotated, the inner edges of the extension plates are raised and lowered to lift or lower the stack relative to the forwarding rollers 43 and 44 and thereby determining the elevation at which the forwarding roller 44engages the bottom blank of the stack and the resultant pressure -of the contact. Adjustment through the auxiliary plates 45 and 46 is effectedl by levers 51 and 52 fixed to the shafts 49 and 50 and set screws 53 and 54 carried by the table 7 and engageable with the levers to rock the auxiliary plates on their shafts 49 and 50.

Referring now to the primary scoring and gumming mechanism, to 59 designate shafts-journaled in the extensions 5 and 6 of the main frame in vertical train and fixed on the shafts 55 to 59 are forwarding rolls 60 to 64 inclusive.

and 64 designate pressure rolls cooperative with the forwarding rolls 60 to 64 for conducting the blanks downwardly from the initial forwarding rolls to a change of direction platform presently described. The pressure rolls 60 and 63 are on fixed axes 55 and 58 and the rolls 62 and 64 are on movable axes for the purpose presently disclosed. The shafts 56 and 57 forming the axes for the pressure rolls 61 and 62 are mounted on arms G5 and 66 both fixed on a shaft 67 journaled in the extensions 5 and 6 ofthe main frame so that these pressure rolls may be moved away from their mating forwarding rolls and out of contact with the descending blankby anarm 68 fixed on the shaft 67 and having a roller 69 engageable by a cam 7 O on a shaft 71, also journaled in the extensions 5 and 6, the roller 69 being held in its engagement with the cam and the pressure rolls 61 and 62 in contact with their matingforward rolls by a spring 72 connected with arm 63 and to the frame.

interposed between the forwarding rolls 62 and 63 is a shaft 73 journaled in the frame extensions 5 and 6 and carrying a sleeve 74 on which is a stop blade 75 reciprocable into and from the path of blanks passing through the forwarding train, to interrupt travel of the folded blanks.

The sleeve 74 is operable by a gear segment 76 on a bell crank lever 77 pivotally mounted on shaft 58 and having a roller 78 yieldingly held against a cam 79 fixed on the shaft 71 journaled in the frame extensions 5 and 6 by a spring 81 connected with the crank arm and with one of the frame extension members.

It is desirable, irrespective of the size of the envelope being formed, that the folded blank be fed positively in its travel from the table, but in order to synchronize the feed with scoring and gumming elements, the blanks must be brought to a universal starting position before entering the portion of the train containing the scoring, and gumming members. In order to accomplish this positioning of the blanks and to effect proper alignment thereof, we release the blanks from the upper forwarding rolls to permit the blanks to drop freely upon the stop blade. This release is effected through shift of the arms and 66 carrying the pressure rolls 61 71 and engageable with a roller 69 on the crank arm 68 and yieldingly retained in contact with the cam by the spring 72 heretofore mentioned.

. and 62 through the cam 70 fixed on the shaft f -pressure rollers engage the top The paired rolls 63 and 63 immediately beneath the stop blade `are provided respectively with a longitudinal groove 84 and blade 85 adapted to mesh and score the blanks for side sealing ila s, as indicated by the line 86 in Figs. 8, 9 an 10.

Deli/very' of the blanks by the stop blade to the scoring rolls may Abe timed by adjustment of thecam 70 on shaft 71.

While the blank is passing between the rolls' 64 and 64 the back fla l87 of the folded blank is gummed along its ree edge by a blade 88 mounted von ears 89 carried on collars 9,0 fixed in spaced relation on the shaft 71 and so ad-- justed as to time contact of the blade 88 with the blank as' the edge of the flap 87A reaches a center line relative to the forward-v ing roll 64. The pressure rollers 64- mating with the forwarding rolls 64 are at the' outside of the collars 90'so that the blade 88 may travel between the pressure rollers, the arrangement preferably being such that the and bottom flaps 91 and 92 of the blank.

`The gumming blade 88 receives gum durpositioned in' the pan so that it dips glue therefrom and applies it to the transfer roller 95, which in turn transfers the glue to the blade 88. The roller 102 is vdriven by a pulley 103 fixed on the roller shaft and actuated by a crossed belt 104 running over a pulley 105 rotatable upon a stub shaft 106 carried on the side frame 6, the pulley 105 being driven as hereinafter described to actuate the glue applying roller 102.-

After the blank has been glued, it travels downwardly between a friction forwarding roll 107 and pressure rollers 108, the forwardling roll 107 being rotatably mounted in the side frames 5 and 6 and the pressure rollers 108 rotatably mounted upon arms 109 fixed on a transverse shaft 110 which is also provided with `arms 111 for supporting the pressure rollers 64. Theshaft 110 is rocklce able by a cam 112 fixed on a shaft 113 rotatably mounted at the rear end of the bed plates 3 and 4. Projecting laterallyv on the shaft 110 is an arm 114,carrying a roller 115 contacting with the cam 112 so that when the roller 115 drops into a low lobe 116 of the cam under the influence of springs 117 and 118 attached to the arms 109 and 111 respectively, the pressure rolls 64 and 108 are lifted from contact with their mating rolls to permit the blank to drop upon a platform 119 mounted transversely of the machine and sloping downwardly and rearwardly so that the blank slides downwardly on the platform'in position ready for change of travel as here# .lnafter described.

Yieldingly supported below .the carrying friction- 'roll 107 and lin rotative contact therewith is a complementary friction roll 120 mounted at the end of a pair of arcuate levers 121 that are ivotally supported on studs 122 projecting inwardly of the `upward extensions 5 and 6, the lever 121 being pro-, vided with projecting arms 123 which are engaged by .compression springs 124 supported upon lugs 125 projecting inwardly of the side frame extensions, to support the Vroller 120 in yielding contact with the roller 107. Downward travel of the blank upon the shaft 119 is interrupted by a stop finger 126 whenthe score 86 of the blank is in alignment with' the contact point of the rollers 107 and 120 so that the blank is in position to be fed between the rollers and started I throughthe horizontal train as later described.

The stop fingers 126 comprise hook-shaped members 127 pivotally supported on pins 129 carried at the free end of adjusting levers 130. The hook-'shaped fingers rest upon the sloping shelf and are so positioned thereon by the-adjusting levers 130 that they engage the side fold of the blank and interrupt its travel as soon as the score line is in properl springs 134, attached to the arms and to the side frame standards 1 and 2. Thus it is readily apparent that the hook-shaped fingers may be positioned correctly on the platform according to the size of the blank by manipulation ef the adjusting screws 132,

after which the adjusting screws may be locked with relation to the arms by lock nuts threadedly received on the adjusting screws and engaging the arms.

In order to expel air that may be trapped between the flaps of the blank, we mount a pressure plate 136 in 'spaced relation with the upper surface of thesloping platform and above the blank. The pressure plate is of' a spring-like nature and fixed at its rear end toa rod 137 rotatably mounted in the bed plates slightly above the lower end of the platform, and fixed to `the rod 137 is a lever 1 38 carrying a roller 139 engaging the peto rotate the rod 136 in an anti-clockwise direction to move the pressure plate into pressing contact with the blank, thus expelling air from between the iaps so that the flaps will lie closely together when passing between the friction sealing rolls. As soon as the roller 139 is disengaged from the hi h lobe of the cam, a spring 142 returns t e pressure plate to normal spaced position above the sloping platform and the blank is ready to be fed between the friction rolls 107 and 120 to seal the side flap 143 as now described.

Fixed on a transverse shaft 144 carried by the side frames below the sloping platform are upwardly extending spaced arms 145 carrying at their free ends an arcuate pusher or tucker plate 146 adapted to engage the score line 86 and upon anti-clockwise rotation of the shaft 144 and tuck the blank between the friction rolls 107 and 120 so that the blank is frictionally engaged thereby to feed the blank into the horizontal train of carrying rolls and at the same time pressing the side iap into sealing contact with the back flap. rlhe pusher plate is actuated by a cam 147 fixed on a transverse shaft 148 mounted between the bed plates, the cam contacting a roller 149 carried at the free end of an arm 150 fixed to the shaft 144.

The blank now moves over a horizontal train of rollers designated 154 to 168, the rollers being fixed on shafts 169 rotatably mounted in the bed plates 3 and 4.

1n order to provide a smooth even course for the blanks as they passover the carrying rolls 154 to 168, the bed plates are provided with ia table 170 extending therebetween and having a plurality of rectangular openings 171 through which the rolls project, the spacing between the rolls being bridged by the table portions 172 between the openings 171.

As the blanks move on to the horizontal train of rollers they pass under a triple set of pressure rollers 154 mating with the table roll 154 and normally restrained from engagement with the table roll 154 so that the glued side iap'may pass freely therebetween without the pressure rollers squeezing the glue from beneath the flap, but as soon as the Hap has passed the pressure rollers, the rollers are automatically lowered onto the table roll 154 to feed the blank onward into the machine.` The pressure rollers are lowered by a cam 173 which contacts with a roller 174 fixed at the end of an arm 175 attached to a shaft 176, carried by the side frames 5 and 6 above and to the left of the pressure rollers, and on which the pressure rollers are also mounted by an arm 177. A spring 178 attached to a vertical arm 179 on the shaft 176 normally retains the pressure rollers out of contact with the table roll and the cam roller in contact with its cam 17 3.

The blank then passes beneath a complementary set of rollers 155 and over the table roller 155, the pressure rollers 155 being supportedbyarmsl80projectingrearwardlyfrom the shaft 176. As soon as the high lobe of the cam 173 has engaged the roller 174 on the arm 175 to bring the rollers 154 into contact with the blank, the pressure rollers 155l are lifted from contact with the roll 155 against the iniiuence of the spring 178 so that the glued flap may pass thereunder without contacting the pressure rolls 155 in exactly the same manner as when passing beneath the pressure rollers 154. Thus it is readily apparent that as soon asthe flap passes the rollers 154 the cam 173 causes the rollers to engage the table roll to continue the feed of the blank and at the same time the rollers 155 are lifted from the table roller 155 to permit free passage of the flap, but as soon as the fiap portion of the blank passes the rollers, the cam has moved out of engagement with the lever arm, permitting the spring 178 to return the pressure rollers 155 `into contact with the roll 155 to advance the blank.

About the time that the rollers 155 are in raised position, stop blades 181 (complementary to the stop blade are moved into the line of travel of the blank so that the folded edge of the blank just glued abuts thereagainst to align the blank preparatory for scoring of the bottom flaps 91 and 92, the rotation of the table roll 155 being suflicient to move the blank into engagement with the stop blades while the pressure rollers 155 are out of engagement. The stop blades 181 are carried on a shaft 182 actuated by a gear segment 183 fixed on a stub shaft 184 carried by the bed plate 4. The gear segment 183 is provided with an integral actuating arm 185 which contacts with a cam 186 attached to the shaft of the roller 155 so that when the cam engages the arm, the gear segment is swung in an arc to move the stop blades into stopping engagement with the blank and positions it in parallel alignment with the table roller. rlhe stop ledge is then retracted to its normal position below the line of travel of the blank by a spring 187 acting upon the sector 183. lt is at this point that the pressure rolls 155 again engage the blank to positively continue the feed of the blank along the ta le and under scoring disks 188 and 189, rotatably mounted above the roll 156 in position to score the top and bottom flaps of the envelope as designated at 19() and 191, Fig. 11, the scoring disks being rotatably mounted upon arms 192 loosely mounted on the shaft 17 6. The blank is then ready to be passed through the end-Hap folding and sealing portion of the machine as now described.

The mechanism for folding and gluing the end flaps is carried above the table on a pair of horizontally spaced bars 193 and 193', supported at their ends by horizontal transverse shafts 194 and 195, removablyrx supBorted at their opposite ends in U-shaped seats 196 formed in the upper ends of colums 197 and' 198 projecting upwardly from the bed plates 3 andl 4 as shown in Fig. 1. Yieldingly supported by the bars 193 and 193 are pairs of pressure rollers 157 to 168v complementary to the table carrying rollers 157 to 168 respectively, each pressure roller being rotatably mounted in an angle-shaped bearing member 199 (Fig. 7) provided with a rod 200 slidable through openings 201 in the bars 193 and 193', the rods being provided with reduced extensions 202 which extend through complementary bars 203 and 204 carried in parallel alignment .above the bars 193 and 193 and retained therein by adjusting nuts 205 threaded on the reduced extensions and engaging the' top edges' of the bars 203 and 204. Compression springs 206 4engage the lower sides of the bars and bear against the shoulder portions of the rods formed by the reduced extensions so that the pressure rollers are held in'fyielding contact with their -tracks are spaced slightly above the table to permit passage of the blanks and extend rearwardly thereover to adjacent the roller 161.

' The folding wings comprise flat vertical strips extending longitudinally of the table along'the outside edges of the folding tracks 210 and-211 and are supported by vertical f rods 214 fixed 'to the bars203 and 204, the Y forwardlends 215 of the strips being twisted laterally and into substantially horizontal planes at their ends which project slightly below the table through Anotches 216 so that the end flaps of the blanks pass readily thereover and are guided to a vertical position along the sides of the folding tracks.

The blanks are then conducted along the table with the end aps in vertical position ready to be engaged by a pair of folding wings 217 and 218, pivotally supported above the roll 160 at the outside of the folding tracks and in position to engage the upturned end flaps and fold them downwardly over the folding tracks as now described. The folding wings 217 and 218 comprise plates 219 having laterally bent ears 220 for hinging the plates to prjectinglugs 221 onthe bars 203 by pins 222. The lower ends of the platesn are provided with inbent flanges 223 for engaging the end flaps so that when the lower" ends of the plates are swung inwardly, thel flanges engage the-end flaps and spread them lof the wing smoothly over the tops of the foldin tracks.

The folding wings are actuated y cams 224 mounted on a vertical shaft 225, projecting upwardly from the bed plates 3 and 4 and rotatable inarms 226 on the bed plates by bevel gears -227 fixed on the lower ends of the shafts and meshing with the bevel gears 228 on the shaft of the roll 160.

Mounted below the cams 226 are flanged collars 229 engaged by yokes 230 of reciprocating arms 231 carrying rollers 232 in engagement with the cams. The arms 231 are also provided with a vertical post 233 having an opening 234 adjacent its upper end to slidably receive a connecting rod 235 connected to ears 236 on the folding wings by pins 237 sothat when the high lobe of the cams, ro-

tated by the gears 227 and 228, engage the rollers on the arms 231 to cause them to be moved laterally toward the folding wings the connecting rods will swing the folding wings into flap folding position.

As soon as the cams move out of engagement with the rollers, the wings are returnedv nto normal position by springs 238, attached to the yoke 230. The connecting rods are adjustably mounted in the openings 234: by

' set screws 239.

As the blanks move out of engagement with the folding track, they enter between the roll 161 and a pair of pressing rollers 161 which engage the blanks over them end flap folds to positively crease the folds. The top flaps of the blanks then engage under a retaining bar 241 which retains the top flaps in folded position during the remainder of the travel through the machine, the bar being suspended by rods 242 from the bars 203, as shown in Fig, ,1. The bottom flap, as it leaves the pressing rollers 161 engages a flap opening wing 243 to open the flap for receiving gum -as now described.

The opening wing (Fig. 6) comprises a strip having @hook-shaped knife edge 244 on its forward end for engaging under the flap, and rearwardly of the hook-shaped knife edge 244 the strip increases progressively in cross section, as at 245, so that the v flap being progressively engaged thereby, is returned to a horizontal position as shown in Figs. 6 and 13. The opening wing 243 is supported from an offset arm 246 projecting rearwardly of the folding track 211 and attached to the end of the hook-shaped edge As the blank co"'"tinues through the machine, it passes under .a glue applying disk 247 rotatably mounted on a shaft 248 supported adjacent a glue pan 249 which is suspended from the bars 193 and 193A (complementary to the glue pan 99) containing glue vfor gumming the bottom iaps, the glue being applied vfrom the rollerv 251 to the roller 250, the roller 251 being drivenby a spur'gear 252 meshing with a spur gear 253 on the roller shaft 163. In order to provide light contact of the gluing disk with the blanks, the table is hollowed out as at 254 so that the blank may move away from the disk and only a wiping contact with the blankis provided.

After the gum has been applied, the blanks pass over the rollers 165, 166 into a flap-closing mechanism now described.

The Hap-closing mechanism includes a flat strip 255 positioned obliquely with the center line of the table and supported by a rod 256 suspended from the horizontal bar 204, as best shown in Fig. 6. The forward end of the strip is inclined downwardly below the surface of the table through a notch 257 so that the opened Hap may readily pass onto the closing strip and be progressively turned to closing position by contact with the inner edge 258 of the closing strip.

In order to insure the correct folding of the end flap at its former fold, we provide a guide strip 259 also suspended from the horizontal bar 204 by a rod 260, the guide strip being in alignment with the folding rail 211 so that the outer forward edge 261 of the vstrip is in alignment with the former fold. The strip is preferably cut away rearwardly of the edge 261 so that as the flap is turned back by the closing strip 255, the flap will be pressed upon the back flap of the blank in sealing position without contacting the guide strip.

The blank is then a completed envelope and passes off the end roll 168 upon an endless belt 262 operating over a pulley 263 rotatably mounted oii a shaft 264 in the bed plates, over an idling pulley l265 rotatably mounted onextensions 266 of the bed plates, over a pulley 267 rotatably mounted at the end of the extensions, and then over a pulley 269 rotatably mounted on a shaft 270 carried in ears depending from the bottom edges of the bed plates.

The pulley 269 comprises the drive for the belt and is actuated by a worm gear 271 fixed to the shaft and meshing with a worm 272 on a line shaft hereinafter described. A belt tightener is also provided for the belt and comprises an arm 273 pivotally mounted on the shaft 270 and carrying a roller 274 contacting the belt adjacent the pulley 269, tension on the arm 273 being maintained by a weight 275 suspended by a rod from the end of the arm.

Rotatably mounted between the bed plates on a shaft 276 is a stacking drum 277 contacting with the upper surface of the belt adjacent the table roller 168 so that when the envelopes drop upon the belt they passbetween the belt and the drum and are carried by the drum into a substantially vertical position on the belt and stacked on edge against an abutment 278 slidable over the-rails 279 formed on the upper edges of the bed plate extension; thus it is readily apparent as the blanks move onto the belt in a horizontal fiat position, they are 'righted by the drum and stacked on the belt ready for removal.

As the stack increases, the abutment 278 slides along the bed plate extensions until a sufficient number of blanks have accumulated, after which the blanks are removed and the abutment 278 returned to position adjacent the drum 277.

Now referring to the driving mechanism for the various rolls and cams for actuating the pressure rollers, the vertical train of rollers are driven from the main shaft 35 by a vertical shaft 280 having a spiral gear 281 on its lower end meshing with a complementary spiral gear 282 on the driving shaft. The shaft 280 projects upwardly along the side of the upright extension 6, and is provided adjacent each of the roller shafts 56, 57, 58 and 59 with spiral gears 283 (Fig. 5) meshing with the spiral gears 284 on the ends of the shafts 56 to 59. The roller shaft 55 is provided with a spur gear 285 meshing with an idler gear 286 mounted on a side frame 6 and meshing with a gear 287 on the roller shaft 56 and the friction roller 43 is driven by a spur gear 288 meshing with an idler gear 289 on the side frame which is driven by a gear 290 on the roller shaft 55 (Fig. 5).

The pulley 105for actuating the gluing mechanism for the side flap is driven by a pulley 291 on the shaft 71 by a belt v292the shaft 71 being rotated by a gear 293 fixed on the shaft and meshing with a gear 294 fixed on the roller shaft 59 (Fig. 2).

The horizontal train of rollers 154 to 168 n inclusive are driven from a shaft 295 mounted horizontally along the side of the bed plate 4, and rotated by bevel gears 296 and 297 'wom the vertical shaft 280. the horizontal shaft 295 being provided adjacent each of the rollers with spiral gears 298 meshing with spiral gears 299 xed on the ends of the roller shafts. The worm 27 2 before mentioned for driving the stacking belt is also mounted upon the end of the horizontal shaft.

-The cam shaft 113 is driven from the main shaft 35 by an inclined shaft 300 having a spiral gear 301 on its lower end meshing with the spiral gear 282 on the driving shaft, the gear 301 being positioned oppositely to gear 281 on the shaft 280. At the upper end of the inclined shaft 300 is a spiral gear 302 meshing with the spiral gear 303 on the cam shaft 113. The cam shaft 148 is driven from the cam shaft 113 by a chain 304 running over sprockets 305 and 306 fixed at the ends of the respective shafts (Fig. 1).

In order to provide for quickly raising the pressure rollers 157 to 168 to remove crumpled blanks which may become jammed in the iap forming mechanism, the bed plates are provided adjacent to columns 197 and 198 with pivoted levers 307 having seats 308 for the shafts 194 and 195. Adjacent the seats 308 is a hook-shaped extension 309 having 194 and 195 and re-seat'them 1n the seats 308, which restores thepressure rollers in normal l travel of scoring rolls 63 and 63 so that the` complementary seats310. Integral with the plvoted arms are handle members 311 by which the arms 'may be rocked rearwardly toy causethe shafts194 and 195 to be raised upwardly 1n their yokes and seated in the complementary seats 310, thus raising the pressure rollers to permit removal of the crumpledblanks, after `which the arm may be rocked in the reverse direction to lower the shafts contact'with the carrying rolls.

'In operating a machine constructed and assembled as described, the envelope blanks are placed in a stack upon the table 7 and supported bythe posts 15, after which the frame 9 is manipulated to position the stack in position y.over the feed rollers 41 and42 so that when the blanks are fed into the machine the initial side fold is produced in the proper place The cams 70 and 79 are then adjusted o n their shafts so that the stop blade 75 is swung intoposition to interrupt travel of the blanks in proper timing relation to the score for the sealing flaps is made in the propA er place on the blank and the rollers 61 and 62 are raised according to the timing adjustment of the stop blade.

The stop lingers 126 are then adjusted by manipulating the adjusting screws 132 so that the blank is positioned upon the sloping platform ready to be tucked between the friction rolls 107 and 120 to feed the blank into the horizontal train of rollers. The cam 184 is then adjusted to move the stop ledge 181 into position to interrupt the travel of the blank, the cam 173 also being adjusted to raise the rollers 154 and 155 according to the size of the sealing flap. j

The end fiap folding and gumming mechanism, mounted' upon the bars 193 and 193 is then adjusted laterally according to the width of the blank by moving the bars 193 and 193' on their supporting shafts 194 and 195. A gluing' disk 247, of the required diameterfor applying gum to the end flap is applied to the shaft'248 and the machine is then ready for operation. The Iblanks are drawn into the machine by the rollers 43 and 4 4 to produce the initial fold and feed the blanks downwardly into the vertical train of rollers where the sealing Hap is scored and m applied to the back iap, after which the lank drops on tothe sloping platform 119 where it is fed by. the tucker 146 between sealing rolls to seal thel side Hap and feed the blanks into the horizontal train of rollers. i v,

The end flaps are then scored by the scoring disks ,188, after which the blanks pass under the folding tracks 210 and 211 and the end flaps folded over the rails by the folding wings 217 `and 218. The folds formed 'over the folding tracks are then crea'sed by the the blank passes on to the folding guide 255 and the end flap is folded over the back iiap and sealed by the sealing roller 312 completing the envelope which drops upon the belt 262 and is carried into stacking position by the stacking drum 277, as before described.

From the foregoing it is readily apparent that we have provided a machine well adapted to the purpose for which it is intended and having a substantial increase in capacity over present machines due to the peculiar construction whereby the blanks are initially folded in the feeding operation. It is also apparent that we have provided a machine requiring a minimum of floor space thereby increasing factory capacity in that a greater number of machines maybe installed in a given floor space.

What W'e claim and desire to secure by Letters Patent is:

1. In an envelope making machine, a table for supporting a stack of blanks, having a delivery opening, a series of forming members arranged in vertical train beneath said opening, means for delivering blanks from the stack through the opening to said train, a series of forming members arranged in horizontal train, and means for diverting partially formed blanks from the end of the vertical train into the horizontal/train. y

2. In an envelope making machine, a table for supporting a stack of blanks, means including a forwarding roll for removing blanks from the stack, means effecting intermittent contact of said roll with the bottom of the stack, and envelope forming means operable on the blanks following removal of the blanks from the stack by said removing 3. In an envelope makino machine, a table for supporting a stack of: blanks, means including a forwarding roll for removing blanks from the stack, means for reciprocating said forwarding roll toward and from the stack in a fixed path, adjustable means for spacing the stack relative tothe forwarding roll, and 'envelope forming means.' operable on the blanks following removal of the blanks from the stack by said removing means.

4. In an envelope makingV machine, a table for supporting a stack of b anks havin al delivery opening, means for removing lanks from the stack including rolls, rotatable into circumferential Contact and planetary about diferentaxes to effect enga ement of one only of the rolls with the bottomlank of the stackl and envelope forming means operable on the blanks following removal of the blanks from the Astack by said removing means.

5. In an envelope lmaking machine, a table for supporting a stack of blanks having a tiO delivery opening, means for removing blanks from the stack` including rolls rotatable into circumferential contact and planetary about different axes to effect engagement of only one of the rolls with the bottom blank of the stack, means for intermittently reciprocating the rolls in this planetary path, blanks following removal of the blanks from the stack by said removing means.

6. In an envelope making machine, a table for supporting a stack of blanks, having a delivery opening, pivotally connected arms rotatably mounted on spaced axes, contacting rolls rotatably mounted on the respective arms, means yieldingly urging the arms to retain the rolls away from the stack, means for reciprocating the arms to effect intermittent contact of one of the rolls with the stack, and envelope forming means operable on the blanks following removal of the blanks from i the stack by said removing means.

7. In an envelope making machine, a table for supporting a stack of blanks, .having a delivery opening, pivotally connected arms rotatably mounted on spaced axes, contacting rolls rotatably mounted on the respective a1'ms,'means yieldingly urging the arms to retain the rolls away from the stack, means for reciprocating the arms to effect intermittent Contact of one of the rolls with the stack, means for rotating the rolls in a direction to withdraw a blank interposed therebetween from the stack, and envelope forming means operable on the blanks following removal'of the `blanks from the stack by said removing means.

8. In an envelope making machine, a table for supporting a stack of blanks, having a delivery opening, pivotally connected arms rotatably mounted on spaced axes. contacting rolls rotatably mounted on respective arms in different horizontal planes, means yieldingly urging the arms to retain the rolls away from the stack, means for reciprocating the arms to effect intermittent contact of one of the rolls with the stack, and means for rotilting the rolls in a direction to withdraw a blank interposed therebetween from ,the

stack, and envelope forming means operable on the blanks following removal of the blanks from the stack by said removing means.

9. In an envelope making machine including blank forming mechanism, means for support-ing a stack of-blanks, means for removing blanks from the stack, a vertical series of forwarding rolls, means for rotating said rolls, a mating pressure roll for each forwardmg roll, some of the pressure rolls being carried in arms having fixed mounting on a common axis, a stop member for timing travel of the blank with relation to the forming mechanism, and cam mechanism for shifting sa1d axls to reciprocate the pressure rolls to release pressure on the blank for allowing the blank to contact the stop member.

10. In an envelope making machine, blank forming mechanism, means for supporting a stack of blanks, means for removing blanks from the stack, a vertical series of paired forwarding rolls in position for receiving blanks from the removing means, a stop interposed insaid train for timing the blanks with relation to the blank forming mechanism, and av gear segment operable with one of the rolls in operable relation with the stop.

11. In an envelope making machine, means for supporting a stack of blanks, means for removing blanks from the stack, a vertical series of paired forwarding rollsl in position for receiving blanks from removing means, a stop interposed in said train, and a gear segment operable with one of the rolls in operable relation with the stop, and tbe members of one pair of rolls having respectively a longitudinal scoring groove and a complementary blade.

12. In an envelope making machine, a table for supporting a stack of blanks, means for receiving blanks separately from the stack, a vertical train of forwarding rolls, means interposed in said train for creasing a flap on a blank during its passage, blank supporting means at the end of said train, paired forwarding rolls adjacent said means, and a reciprocating blade engageable in the crease of the blank to deliver the blank to said last named rolls.

13. In an envelope making machine, a table for supporting a stack of blanks, means for removing blanks separately from 'the stack, a vertical train of forwarding rolls, means interposed in said train for scoring the blank during its passage, blank supporting means at the end of said train, paired forwarding rolls adjacent said means, and a reciprocating blade engageable in the score of the blank to deliver the blank to said last named rolls, one of said last named rolls beingshiftable to permit delivery of the blanks to said supporting means.

14. In an envelope making machine, a table for supporting a stack of blanks. means for removing blanks separately from theI stack, a vertical train of forwarding rolls, means interposed in said train for creasing the blank during its passage. blank supporting means at the end of said train, paired forwarding rolls adjacent said means, and a, reciprocating blade engageable in the crease of the blank to deliver the blank to said last named rolls and a horizontal train of paired rolls for forwarding blanks delivered by said last named rolls.

15. In an envelope .making machine, a table for supporting a stack of blanks, means for removing blanks separately Vfrom the stack including means for folding the blank to produce front and back flaps, a vertical train of forwarding rolls, means interposed in said train for scoring the blank during its passage, an inclined table .at they end of said train, an adjustable stop for envelopes delivered to said table, a shaft-rotatable adjacent the inclined table, a plate* carried by said shaft and overlying said table, a lever on saidv shaft, a roller on said lever, a rotatable cam, and means yieldingly urging said roller to engagement With the cam to effect intermittent pressure movement of the plate toward said table to remove air from between the flaps of the blank.

16. In an envelope making machine, means for feeding blanks into the machine, means for'conveying the blanks uthrough the machine, and means for forming the blanks into envelopes including end flap forming'mecha nism comprising spaced folding tracks beneath which the blanks are conveyed, means movable into engagement with the end flaps on the blanks for folding the end flaps over the tracks, and pressing rolls for creasing the folds formed over the tracks.`

17. In an envelope making machine vmeans for feeding blanks into the machine, means for conveying the blanks through the machine, and means forming the blanks`into envelopes including end flap forming mechanism comprising spaced folding tracks beneath which the blanks are conveyed, guide lWings adjacent the tracks forl engaging the y end flaps of the blank to guide the flaps into engagement with the tracks, folding members movable into position to fold the flaps over, the tracks, and pressing rollers for creasing the folds formed'over the tracks.

18. In an envelope making machine means for feeding blanks into the machine, means for conveying the blanks through the machine, and means forming the blanks into envelopes including iiap forming mechanism comprising spacedfolding tracks beneath yvhich the blanks are conveyed, guide Wings adjacent the tracks for engaging the flaps of the blank to guide the flaps into track engagement, pivoted Wings for foldingthe iaps over the tracks, reciprocating arms for actuating the Wings, cam means for reciprocating the arms, and means for creasing theI folds formed over the tracks.

19. In an envelope making machine, means for 'feeding blanks into the machine, means for conveying the blanks throughthe machine, and' meansJforming the blanks into envelopes including flap forming mechanism comprising spaced folding tracksl beneath' which the blanks are conveyed, means for folding the -laps over the tracks, pressing rolls for creasing the folds formedvover -the tracks, flap opening means, agumming disk for applying gum tothe blanks adjacent' the iap opening means, and means forclosing the .Opened flap in sealing contact with the gum.

` over the tracks.

for feeding blanks into the machinemeans i for conveying the blanks through the ma# chine, and means forming `the blanks into envelopes including flap forming mechanism comprising spaced folding tracks beneath which the blanks are conveyed, means for lfolding the iaps. over the tracks, pressingv rolls for creasing the folds formed over the tracks, flap opening means, a gumming disk for applying gum to the blanks adjacent the flap opening means, and a guide strip positioned obliquely to the travel of the blank to guide the opened flap' into sealing contact With the gum. y

21. In an envelope making machine, means for feeding blanks into the machine, means for conveyingthe 'blanks through the machine, and means forming the blanks into envelopes including flap formingmechanism comprising spaced folding tracks beneath Whichthe blanks are conveyed, means for folding the flaps over the tracks, pressing rollsA for creasing `the folds formed over the tracks, fiap opening means, a gumming disk for applyinggum to the blanks adjacentl the ap opening means, a guide 'strip cooperating with the closing means for assuring the closing of the flap on thecrease formed by the pressing rolls.

. 22. In an envelope making machine, means for feedingblanks into the machine, means for conveying theA blanks through the machine, and means `forming the blanks into envelopes including iap forming mechanism comprising disks for scoring the aps, spaced folding tracks in alignment with the scoring disks, means for folding the aps over the folding tracks on the score` lines formed by the scoring disks, meahs for reopening oneof the flaps, means for applying gum to the open flap, and means for sealing the Hap.

23. In an envelope making machine, flap forming mechanism comprising a frame, a train of forwarding rolls carried by the frame for conveying envelope blanks, pressure rollers complementary to the forwarding rollers, spaced bars for supporting the pressurelrollers, means yeldingly urging the pressure rollers into' Contact with the forwarding rolls, flap forming tracks suspended from the bars, means for folding flaps of the blanks over the tracks, pressing rolls in line with the tracks for creasing the /fold formed 24. In an envelope making machine, Hap forming mechanism comprising a frame, a train of forwarding rolls carried `by the frame for conveying envelope blanks, pressure rollers complementary to thel forwarding rolls, spaced bars for supporting the pressure rollers, means for raising the bars to lift the pressure rollers out of contact with the forwarding rolls, means yieldingly urging the pressure rollers into contact with `the forwarding rolls, flap forming tracks ing mechanism comprising a frame, a train of' forwarding rolls carried by the frame for conveying envelope blanks, pressure rollers complementary to the forwarding volls, spaced bars for supporting the pressure rollers, shafts connecting the bars, columns on the frame `for seating the shafts to support the bars, cam lever means for lifting the shafts from seating engagement with the columns to lift the pressure rollers from contact with the forwarding rolls, means for forwarding blanks from said stack singly to the Hap-forming means, and means for delivering formed blanks from the machine.

26. In an envelope making machine, a table for supporting a stack of blanks having a delivery opening, a frame supported on the table, stack engaging arms adjustable on the frame, means for adjusting the frame to position the stack over the delivery opening, means for delivering blanks singly from the stack, and flap-folding and sealing mechanism adapted for` receiving the blanks from said delivery means.

27. In an envelope making machine, a table for supporting a stack of blanks, means, in'- cluding a forwarding roll for removing -blanks from the stack, means for reciprocating said forwarding roll toward and from the stack in a fixed path, means for adjusting the stack laterally of the forwarding roll, adjustable means for spacingthe stack relative to the forwarding roll, and flap-folding and sealing mechanism adapted for receiving blanks from the forwarding roll.

28. In an envelope making machine, a table for supporting a stack of blanks, means, including a forwarding roll, for removing blanks from the stack, means for reciprocating said forwarding roll toward and from the stack in a fixed path, and adjustable means for spacing the stack relative to the forwarding roll, comprising spaced plates for engaging the stack adjacent the sides of the roll, pivoted arms supporting the plates, and flap-folding and sealing mechanism adapted foi*1 receiving blanks from the forwarding ro 29. In an envelope making machine, a table l for supporting a stack of blanks having a delivery opening, means includingia forwarding roll for removing blanks from the stack through the table opening, means for 'reciprocating said forwardin roll toward and from the stack in a fixe path, plates supported in the/table opening adjacent the forwarding roll, arms pivoted below the table and connecting the plates to raise'or lower the stack with relation to the forwarding roll, yscrew means for adjusting the levers, and flap-folding and sealing mechanism adapted for receiving blanks from the forwarding roll.

30. In an envelope making machine, a table for supporting a stack of blanks, means for removing blanks separately from the stack said means making an initial sidefold of the blank to provide front and back flaps, a vertical tr'ain of forwarding rolls, means interposed in said train-for scoring the front flap to provide a sealing flap, means for gumming the back flap, blank supporting means at the end of said train, paired forwarding and sealing,rolls adjacent said means, a reciprocating blade engageable on the score line to deliver the blanks through said last named rolls, a second train of forwarding rolls in line with the last named rolls, pressure rollers in Contact with the first of said last named train of forwarding rolls, and means for raising the pressure rollers from contact with the blanks during the interval at which the sealed flap passes under the pressure rolls.

31. In an envelope making machine a table for supporting a stack of blanks, means for removing blanks separately from the stack said means making an initial side fold of the blank to provide front and back flaps, a vertical train of forwarding rolls, means interposed insaid train for scoring the front flap to provide-a sealing flap means for gumming the back flap, blank supporting means at the end vof said train, paired forwarding and sealing rolls adjacent said means, a reciprocating blade engageable on the score line to deliver the blanks through said last named rolls, a second train of forwarding rolls in line with the last named rolls, pressure rollers in contact with the first of said last named train 'of forwarding rolls, pivoted arms supporting the pressure rollers, and cam means for actuating the arms to lift the pressure rollers from contact with the blanks permitting free passage of the sealed flaps to prevent displacement of the uiidried gum.

32. In an envelope making machine, a table for supporting a stack of blanks, means for removing blanksy separately from the stack said means making an initial side fold of the blank to provide front and back flaps a vertical train of forwarding rolls, means interposed in said train for scoring the front flap, to provide a sealin flap means for gumming the back flap, blank supporting means at the end-of said train, paired forwarding and sealing rolls adjacent said means, a reciprocating blade engageable on the scoreiline to deliver the blank through said last named qrolls, a second train of forwarding rolls in line with the last named rolls, pressure rollers in contact with the first of said last named train of forwarding rolls, pivoted arms supporting the pressure rollers,cam means for tion for receiving blanks from the removing 33. In an envelope making machine, meansfor supporting a stack of blanks, means for delivering blanks individually from the stack, blank creasing and gumming mechanism beloW the delivery means, a stop member for interrupting travel of the blanks to time the blanks With relation to the creasing and gumming mechanism, and means for re* ciprocating the stop member to and from position for interrupting travel of the blanks the movement of the stop member being adjustable to adapt the machine for blanks of different dimensions. n

34. In an envelope'making machine, means for supporting a stack of blanks, means for delivering blanks individually from'4 a stack, means for creasing the blanks, a stop member, means for reciprocatin the stop member to and from position ger interrupting travel of the blanks, means for timing movement of the stop member for timing travel of the blanks in the machine With relation to the creasing means and to adapt the machine for blanks of different dimensions, a plurality of pairs of forwarding rolls inter'- mediate the delivery means and the stop member, some .of the rolls being movable from and toward their mates to free the blanks for contact with the stop member.

35.- ln an envelope making machine including creasing and gumming mechanism, means for osupporting a staek'bf blanks, means for 'delivering blanks individually from 'a stack into the creasing and gumming mechanism, a stop member,and vmeans for reciprocatingthe stop member to and from position for timing travel of the blanks into the creasing means and gumming mechanism, means for timing movement of the stop member to adapt the machine for blanks of different dimensions, a plurality of pairs of forwarding rolls intermediate the deliverymeans and stop member, some of the rolFs belng movable toward and from their mates to free the blanks, and means for shifting the relation With the gear on the stop member, and a cam for actuating the gear segment, thecam being adjustable to'vary timing of th stop movement relative to operation of the blank removing means.

37. In an envelope making machine', blank forming mechanism, a table for supporting a stack of blanks, having a delivery opening, means movable to and from the stackfor removing the lowermost blank in the stack through theopening, including'means for once folding the blank and means for delivering the partially folded blank into the blank forming mechanism.

lny testimony whereof We aiiix oui-'signatures.

' ALFRED WINKLnn. MAX DNNEBiEn.

movable rolls synchronously with movement of the stop member.

36. In an envelope making machine including blank forming mechanism, means for supporting a stack of blanks, means for removing blanks from the stack, a vertical series of paired forwarding rolls in posimeans a st op member interposed in said tram for adjusting the blanks in tuning relation with the forming mechanism, agear on the stop member, a gear segment in operable

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2709951 *Sep 22, 1952Jun 7, 1955Berkley Machine CoApplicator for applying pressure-sealing material in a rotary envelope making machine
US3395624 *Oct 11, 1966Aug 6, 1968Winkler Duennebier Kg MaschDevice for folding flaps of envelopes and the like
US8061242Aug 29, 2007Nov 22, 2011Kama GmbhTool carrier device and apparatus for processing flat blanks
Classifications
U.S. Classification493/241, 493/254, 493/261, 493/246, 493/243, 493/266
International ClassificationB31B19/00
Cooperative ClassificationB31B2221/10, B31B21/00
European ClassificationB31B21/00