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Publication numberUS3266799 A
Publication typeGrant
Publication dateAug 16, 1966
Filing dateOct 12, 1964
Priority dateOct 12, 1964
Publication numberUS 3266799 A, US 3266799A, US-A-3266799, US3266799 A, US3266799A
InventorsIngalls James E
Original AssigneeColumbia Res And Mfg Company I
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Stacking apparatus having yieldable feed means
US 3266799 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

J. E. INGALLS STACKING APPARATUS HAVING YIELDABYLE FEED MEANS 2 Sheets-Sheet 1 Filed Oct. l2. 1964 K, W&

mm. www v www w @1mm ww ug- '16, 1966 .1. E. INGALLS 3,266,799

STACKING APPARATUS HAVING YIELDABLE FEED MEANS Filed OCT.. l2, 1964 2 Sheets-Sheet 2 f gf INVENTOR. Jaw: es Y /Izga'lis United States Patent O 3,266,799 STACTHNG APPARATUS HAVllNG YHELDABLE FEED MEANS Eames E. Ingalls, Brooklyn, Conn., assigner to Columbia Research and Manufacturing Company Enc., a corporation of Connecticut Filed Get. 12, 1964, Ser. No. 403,066 12 Claims. (Cl. 271-64) This invention, which is a continuation-impart of Imy copending patent application Serial Number 335,926, Jan- -ulary 6, 1964 for a Stacking Apparatusj now Patent No. 3,212,774, relate-s to improvement in a stacking apparatus or the like and more particularly to -a means for feeding articles into and through such apparatus.

For example the present day high speed printing presses deliver articles such as flexible sheets which must lbe stacked for subsequent 'handling and use. The feeding or such articles at a high rate of speed must be done in a manner which will avoid interruption to the steady flow should the articles tend to jam or clog up. It is therefore one object of my invention to provide a means for receiving and advancing such iarticles without jamming in a stacking apparatus. As a specic exa-mple I disclose suoli an apparatus in my pending patent application Serial Number 335,926 filed January 6, 1964 for a Stacking Apparatus of which this is a continuation-impart, now Patent No. 3,212,774. This example receives articles from a printing press at a high rate of speed. It is common practice to operate my stacker at lineal speeds in excess of 60() feet per minute :as long las the belt speed of the stacker is faster than the web speed of the printing press. For example, small articles measuring 2 inches long and 31/2 inches wide can be stacked at the rate of 30 sheets per second.

Another object is to provide an attachment which may be applied to almost lany type of apparatus which receives articles of this type from an automatic machine at a high rate of speed.

In another embodiment of my invention I provide means for discarding 4undesired articles which might be undesirable at the entrance of the apparatus. Hence still another object is to provide a means for selectively discarding articles entering the apparatus.

Yet another object of my improvement is to provide means for applying proper tension to the conveyor belts which advance the articles to Ibe stacked.

Other objects and a fuller understanding of the invention may be had by referring to the following description and claims, taken in conjunction with the accompanying drawings in which:

FIGURE 1 is a top plan view showing my invention attached to a stacking apparatus;

FIGURE 2 is a longitudinal side view of the structure shown in FIGURE 1;

FIGURE 3 is a right end (as viewed in FIGURES 1 and 2) elevation of the structure;

FIGURE 4 is a sectional view taken on line 4-4 of FIGURE 1;

FIGURE 5 is a similar to FIGURE 4 except that it shows a massed group of articles entering the apparatus of my invention;

FIGURE 6 is similar to FIGURE 4 except that the massed group of articles has been advanced from the position shown in FIGURE 5;

FIGURE 7 shows another embodiment of my invention; and

FIGURE 8 is a vertical cross sectional view taken on line 8-3 of FIGURE 2.

With reference to the drawings the invention is illustrated as being incorporated in a stacker indicated by the numeral 1t). As illustrated the stacker comprises a main 3,266,799 Patented August 16, 1966 ice supporting frame 11 composed of longitudinal side members 12 connected by cross bars 13. The frame 11 is secured by any suitable means to a telescoping pedestal 14 comprising la base plate (not shown) a hollow standard 14b and a vertical member 14C sliding within the hollow standard 14h and held at any desired height by the clamp 15 which enables the stacker 10 to be adjusted to the correct height to receive articles 31 as for example a battery of labels 40 mounted on la backing sheet 41 from a printing press not shown.

A continuous conveyor belt 17 is supported at the receiving end 13 by a roller 20 journaled in the sides 12 of the frame 11 and supported at the stacking end 19 by a roller 21 journalled in slide plates 70 as described in more detail later. The upper reach A of the 'belt 17 spanning the distance between the rollers 20 and 21 is supported by fan inter-mediate roller 22 also journaled in opposite side members 12 of `frame 11. The rst section B of upper reach A between roller 2t) and intermediate roller 22 receives the articles 31 from the printing press at a high rate of speed and advances them with partial assistance .from a second belt 24 later described to the second section C of reach A between intermediate roller 22 and roller 21 at the stacking end 19 which second section C serves as a bottom for the stack pile 23. A cross bar 13 extending between the two sides 12 may be mounted against the lower surface of second section B to provide additional support for the stack pile 23 if desired.

As shown most clearly in FIGURES 1 and 2 roller 21 iat the stacking end 19 is journaled in an adjustable end frame 70 slidably mounted on frame side members 12 to enable the tension on the gang of belts 17 to be adjusted. This slidable feature may be accomplished by any suitable means but I prefer to provide a slot 71b in each side member 70C of frame 71) to receive bolts 71a threaded into frame side members 12 respectively.

Also referring especially to FIGURES 1 and 2 as means for tensioning each individual belt, I provide a series of bell cranks 72 adjusta'bly mounted on a transverse rod 73 Isecured between the frame 70 side members 70e. Each bell crank '72 is provided with a roller 74 engaging the lower reach of belt 17. By swinging the bell crank 72 on rod 73 the correct tension is deter-mined and the `bell crank 72 is locked in position by thumb screw 75.

A back stop fname 29 is movably mounted on the sides 12 of frame 11 and secured by clamping means subsequently described in detail, to arrest vby means of a depending abutment 82 at a desired position the advance of articles 31 reposing in the second section C of the conveyor belt 17.

Another continuous belt 24 is mounted between rollers 25 and 26 in a movable fname 38 superimposed on main frame 11 so that the lower reach of this Ibelt 24 engages articles 31 reposing on the first section B of lower belt 17, and also may engage the surface of rst section B when upper and lower belts are adjusted for thin articles. The function of the movable fname 38 will be explained in detail subsequently.

In describing my invention I have referred to a single lower and a single upper belt for convenience but in the preferred embodiment I use a plurality of belts and in the case of the yupper belt I use round belts having the necessary elasticity to maintain a taut belt condition.

I p-rovide grooves 25a in roller l25 to receive belt 24 of sufficient depth such that the surface of the roller will contact the top surface of articles 31 entering the stacker and the top of the belt will be on a line with the -top of the roller. By referring to FIGURE 3 it will be noted that there is a greater line of contact between the upper surface of roller 25 and article 31 than between the sum total of the belts 24 and article 31. This is necessary in order to provide a substantial and extended line of gripping contact to insure that the leading edge of article 31 will always be normal to the line of travel of the article 31. If the gripping depended on belts alone the points of belt contact as compared to the line contact of the roller there would be a tendency Afor the articles to skew particularly in the case of wide articles or articles which were short in length (as measured along the line of travel).

Movable upper frame 38 comprises a pair of longitudinal frame members 39 aligned with main frame side members 1|2 the former being maintained in spaced relationship by cross members 42 and 43. Rollers 25 and 26 are journalled in longitudinal frame members 39 of frame 38 at the receiving and stacking ends respectively of movable frame 38. Roller 25 is provided with a gear 27 which meshes with gear 28 on lower roller 20 and is driven thereby so that the lineal speed of both belts is the same. I also provided a space on the roller shafts so that one of the gears may be disengaged 'from the other by sliding along the shaft. This feature is provided as a safety precaution in case of long articles being stacked so that when the printing press which is delivering to the stacker is stopped for any reason and the article has not been cut off the upper roller will not turn on the freshly printed upper surface of the article and damage it. Since the articles -31 passing through the stacker are long the belts will subsequently grip the articles 3-1 and carry them along by means of the force of the lower belt 17 which will still be driven. Roller 20 is driven through belt 17 from roller 21 and roller 21 is in turn connected by motor belt 76 to motor 77. Although I have described my preferred form, any suitable means may be used to drive either roller 20 or 21.

The gear teeth on gears 27 and 218 are of such design, as for example involute teeth, that the gears may be separated for a limited distance and still operate together to drive the respective rolls.

Movable iframe 38 is connected to frame 11 by means of a pair of links 44, one on each side which turn on link pins 46 and 47 secured in the movable frame 38 and frame l11 respectively. Since the links 44 each have a at surface engaging a corresponding flat surface on the movable frame 38 and yframe 11 respectively the movable frame 318 is always aligned with the frame 11 as it moves away from and to frame 1.1.

A tension biasing spring 48 connects lthe `frame 38 on each side thereof to the frame y11 and urges frame 38 against frame 11 yet being resilient perm-its frame 38 to rise above frame 1i1 when an accumulation of articles 31 pile up between the belts 17 and 24.

The links 44 are mounted in an oblique manner relative to the upper edge 12a of the longitudinal side member -12 of frame 11 to permit the movable frame 38 to be raised in three different positions: position I as shown in FIG- URE 4 in which the movable frame 38 is parallel to the upper edge .12a of longitudinal side member 12; position II as shown in FIGURE 5 in which the receiving or entering portion of the frame 38 is raised in oblique relation to edge 12a; and position III as shown in FIGURE 6 in which the frame 38 is raised in oblique relation to edge 12a at its stacking end.

Referring now to FIGURES 4, 5 and 6 it will be noted that roller 26 (mounted in the stacking end of movable frame 38) causes a portion of the upper reach B of belt 17 to be deilected below the top of intermediate roller 22 forming a sort of ramp or slope 33` to permit an article 31 reposing on the reach B to enter the stack pile 23 underneath the bottom of the stack pile 23, thus making it possible to form a st-ack from the bottom up which is the primary novelty of my pending patent application previously referred to.

In another embodiment of my invention as shown in FIGURES l, 2 and 7 I fu-rther provide a detlector mechanism for discarding certain articles which the operator of the stacker may observe to be defective. This comprises a yoke shaped member 49 as viewed in FIGURE l iixed on `a shaft 50 journaled in opposite sides 12. A crank 52 is xed to shaft `50 to cause, when depressed, yoke member 49 with its deflecting edge 51 thereof to move into the path of approaching article 31 and direct it downward and away (now see FIGURE 7).

A control box 54 mounts a counting register 55 and two switches for starting and stopping the stacker 10 and the register 55 respectively. The counting register may be actuated by any suitable means. In my preferred cmbodiment I mechanically contact the moving articles and this contact in turn electronically actuates the counting register.

As the stack pile 23 builds up guide posts 62 and 63 adjacent the corners of the stack pile 23 maintain the edges in even alignment and a pair of hold down weights 68 and 69 movable on vertical guide posts 66 and 67 respectively keep the stack pile 23 rm as will now be described in more detail.

A horizontal transverse rod 58 mounted on back stop frame 29 carries a pair of transversely adjustable arms 60 which are locked in the desired position by thumb screws 64.

In a like manner transverse rod 61 is mounted on cross member 43 o-f movable frame 38 and carries a pair of transversely adjustable arms 61 and are also provided with thumb screws 65 for looking the arms 61 when in adjusted position. Similarly guide posts 63 rise from the arms 61 respectively to engage the edges of the stack pile 23 as it builds up. The Iguide posts 66 and 67 are tapered at the bottom to provide an enlarged cross sectional area as a mouth or lead-in area to guide the rising stack of articles in stack pile 23 when they eventually become properly centered.

A vertical post 66 mounted intermediate the sides of the stacker on back stop 29 and engaging the leading edge of the stack pile 23 carries a slidable hold-down weight `68 resting on the top of the stack pile 23 to insure a compact pile as it builds up.

Opposite the vertical post and mounted in frame 38 and engaging the trailing edge of the stack pile 23 is a similar vertical post 67 carrying a hold-down weight 69 similar to hold-down weight 68.

Referring now to FIGURE 8 the preferred clamping means for holding backstop 29 fixed in its desired location comprises a pair of opposite longitudinal channels 78 in the sides 12 of frame 11 into which the opposite ends 79a of clamping bar 79 are received. The top surface of these ends 79a engage the under side of the top of channels 78. The top of the backstop 80 is provided with two downwardly depending thumb screws 81 which are threaded into clamping bar 79 and by tightening the thumb screws 81 the clamping bar ends 79a are firmly held against the top under surface of channel 78.

In the operation of my stacker articles are delivered from a source of supply such as a printing press in this case presumably at a high rate of speed to the opening between the upper roll 25 and the upper surface of belt 17 that is to say reach B. The lower surface of upper belt 24 engages the top surface of the articles 31 and holds them against the reach B and the articles 31 advance to and enter the stack pile 23 on the ramp 33, as shown diagrammatical-ly in FIGURE 4.

Now in case several articles should accumulate or pile up on top of each other probably due to the high speed or for some other reason arrive at the roll 2S, the increased thickness of the piled up articles 31 causes the movable frame 38 to rise at the receiving edge and permit the accumulation to enter and be engaged by both belts as shown clearly in FIGURE 5.

As the accumulation advances the frame 38 rises to a position parallel to the bottom frame 11 (not shown) and as the accumulation advances the stacking end of movable frame 38 rises and the receiving edge drops back into normal position under the tension of springs 48 as clearly shown in FIGURE 6. However should a second accumulation follow immediately the frame 38 will not drop back but will remain parallel to the bottom frame 11 (again not shown).

When the accumul-ation reaches the ramp 33 it is tucked en masse under the lowest article and under the urge of both belts the articles 3'1 become properly aligned in the stack pile 23.

It will be obvious that if the upper belt was mounted in a frame which was not permited to move a jam would take place stopping the feeding of articles 31 to the stack pile 23.

When the operator of the stacker observes a defective article as for example when a printing press is stopped or started causing a defective printing, the defective article can be discarded by operating the handle 53 to raise the deiiecter edge into the path of the oncoming stream of articles 31 entering the stacker 10.

Although the invention has been described in its preferred form with ya certain degree of particularity, it is understood that the present disclosure of the preferred form has been made only by way of example and that numerous changes in the details of construction and the combination of parts may be resorted to without departing from the spirit and the scope of the invention as hereinafter claimed.

I cl-aim as my invention:

1. In an apparatus for stacking articles a supporting first frame having a receiving end and a stacking end, a belt supporting first roller mounted on said first frame at said receiving end, -a second belt supporting roller mounted on said first frame at said stacking end, a conveyor belt mounted on and extending between said first and second rollers having an upper continuous reach therebetween supported by an intermediate roller, said reach having a first section between said first roller and said intermediate roller for receiving and advancing such articles, said reach having a second section between said intermediate roller and said second roller forming the bottom side of a stack, a vertically movable frame disposed on said first frame above said first section having a receiving end and a delivery end, a third belt supporting roller mounted on said movable frame at said receiving end thereof aligned with said first roller, a fourth belt supporting roller mounted on said movable frame at said delivery end thereof, a conveyor second belt mounted on and extending between said third and fourth rollers and having -a lower portion thereof comprising a second reach adjacent said first section to engage such articles reposing on said first section, said fourth roller so located relative to said intermediate roller that a portion of said second reach adjacent thereto exerts sufficient force against such articles reposing on said first section as they approach said intermediate roller to deflect a portion of said first section so that such approaching articles are directed to enter said stack between said second section and the lowermost arrested article in said stack, means for arresting the advance of such articles on said second section, means connecting said frames to permit limited vertical movement of said movable frame relative to said first frame to enable a piled up plurality of such articles to enter on said first section and continue their advance to said stack and means driving said belts at the same lineal speed.

2. In the apparatus of claim 1 a belt receiving recess in the surface of said third roller corresponding substantially to the width and thickness of said second belt such that said surface will engage such entering article with sufficient pressure distributed to insure its correct align. ment for subsequent advance, and said second belt mounted in said recess.

3. In an apparatus for stacking articles a supporting first frame having a receiving end and a stacking end,

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a belt supporting first roller mounted on said first frame at said receiving end, -a belt supporting second roller mounted on said first frame at said stacking end, a conveyor lbelt mounted on and extending between said first and second rollers having an upper continuous reach therebetween supported by an intermediate roller, said reach having a first section between said first roller and said intermediate roller for receiving and advancing such articles, said reach having a second section between said second roller and said intermediate roller forming the bottom side of a stack reposing thereon, a vertically movable frame disposed on said first frame above said first section having a receiving end and a delivery end, a third roller mounted on said movable frame at the said receiving end thereof and aligned with said first roller, a fourth roller mounted on said movable frame at said delivery end thereof, a conveyor second belt supported by and extending between said fourth and third rollers Iand having a lower portion thereof comprising a second reach to engage such articles reposing on said first section, said fourth roller so located relative to said intermediate roller that a portion of said second reach adjacent thereto exerts sufficient force against such articles reposing on said first section as they approach said intermediate roller to deflect a portion of said first section forming a ramp so that such approaching articles are directed to enter said stack between said second section and the lowermost article in said stack, each of a pair of meshing driving gears mounted on said first and third rollers respectively for driving said rollers one by the other so that the lineal speed of both belts is the same, means connecting said frames to permit limited vertical movement of said movable frame relative said `first frame to enable a piled up quantity of articles to enter on said first section between said first and third rollers, and continue their advance to said stack, and means for driving one of said belts.

4. In the apparatus of claim 3 one of said gears disengageable from the other said gear to discontinue when so desired the driving of said third roller by said first roller when a driving force is applied to said first roller.

5. In the apparatus of claim 3 means for connecting said movable frame to said first frame comprising each member of a pair of parallel link members connecting said first and movable frames respectively and located on the opposite sides of said frames.

6. In the apparatus of claim 1 said first frame comprising a pair of spaced longitudinal side members a third frame mounted on said members at the staking end thereof to slide longitudinal thereon to vary the tension of said first belt, said second roller journaled in said third frame and means connecting said third frame and said first frame to secure said third frame in the proper adjusted position to maintain said desired tension.

7. In the apparatus of claim 6 said third frame comprising a pair of parallel spaced longitudinal side members engaging said longitudinal sides of said first frame respectively, a transverse member mounted between said third frame longitudinal members parallel to the ax-is of and adjacent to said second roller, a swinging arm mounted at one end thereof on said transverse member and at the other end provided with a belt tensioning roller, said tensioning roller engaging said conveyor belt to `apply thereto the desired tension in said conveyor belt and means on said arm to secure said arm in the adjusted position to maintain said desired tension.

8. In the apparatus of claim 1 said first frame comprising a pair of spaced longitudinal side members. a back stop frame extending between said logitudinal side Imembers and slidable thereon, a transverse guide member mounted on said back stop frame in a plane parallel to that of said second section, a pair of rearwardly extending arms adjustably slidable on said guide member each carrying a vertical guide post extending below and above said arm for engaging opposite lateral edges of such articles forming said stack, said guide posts tapering down to a point below said arms in order to include any rising such articles which might stray off the center line of said stack and means for securing said arms to said guide member at the desired position.

9. In the apparatus of claim 8 a transverse guide member mounted on said movable frame adjacent said stack position in a plane parallel to that of said second section, a pair of forwardly extending arms adjustably slidable on said guide member each carrying a vertical guide post extending below and above said arm for engaging opposite lateral edges of such articles forming said stack said guide posts tapering down to a point from said arm in order to include any rising such articles which might stray off the longitudinal center line of said stack and means for securing said arms to said guide member at the desired position.

10. In the apparatus of claim 1 said first frame comprising a pair of spaced longitudinal side members, a transverse shaft journaled in said longitudinal side members spaced from said receiving end, a yoke member disposed at said receiving end having a pair of parallel side arms extending to said shaft and fixed thereon, the portion of said yoke member between said side arms and in front of said receiving end comprising a deflecting edge adjacent and parallel to the parting line between said first and third rollers, a crank mounted on said shaft for moving said yoke so that said deflecting edge is positioned in or out of the normal path of such articles entering said apparatus so that such articles may be discarded when said deflecting edge is positioned in said path.

11. In a conveyor belt mechanism for feeding articles engaged between adjacent companion reaches of a pair of belts the improvement in mounting one of said belts relative to the other said improvement comprising a rst frame mounting a first belt and a second frame mounting a second belt, said frames connected together so that said belts may engage an art-icle when reposing therebetween, said connection comprising a single pair of opposite parallel link members having each end thereof pivotally connected to the sides of said frame respectively, the said pivotal connections to said first frames being spaced longitudinally of sa-id frames from the said pivotal connections to said second frame whereby said link members assume an oblique position to the parting line between said frames when said frames are in a generally nonseparated position, said connection allowing separation of said frames at a first end without necessarily effecting separation of said frames at the other end when an article is engaged between said reaches adjacent said first end, and yieldable biasing means to urge said frames toward each other.

12. In the apparatus of claim 11 the location of said respective pivotal connections and the length of said link members being such that when separation of said frames is causedby an article reposing between said reaches adjacent a first end thereof the direction of movement at said first end of said first frame relative to said second frame has a component parallel to and a component normal to the general plane of the parting line between said frames.

References Cited by the Examiner UNITED STATES PATENTS 2,133,727 10/1938 Staude 271-76 2,314,605 3/1943 Arnold 226--172 X 2,983,417 5/1961 Swanson 226-177 M. HENSON WOOD, JR., Primary Examiner.

W. F. MCCA-RTHY, A. N. KNOWLES,

Assistant Examiners.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2133727 *May 23, 1936Oct 18, 1938Edwin G StaudeDelivery mechanism for paper box machines
US2314605 *May 15, 1941Mar 23, 1943Arnold William OWork feeding mechanism
US2983417 *Mar 26, 1959May 9, 1961Wire Machinery Corp Of AmericaTrack-laying capstan
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3436073 *Oct 16, 1967Apr 1, 1969Newton ChristmasStacker
US3469755 *Sep 29, 1967Sep 30, 1969Hunt Co RodneyApparatus for stripping web material from nip rolls
US3481523 *Jun 13, 1967Dec 2, 1969Us Industries IncStrip stock feeding device
US3649006 *Feb 9, 1970Mar 14, 1972Xerox CorpImproved sheet handling apparatus
US3743155 *Jan 18, 1972Jul 3, 1973Cumberland Eng CoApparatus for feeding sheet material
US4145039 *Sep 15, 1977Mar 20, 1979Sunds AbMethod and apparatus for conveying sheets of corrugated cardboard or similar material through a processing machine
US4256299 *Jul 18, 1979Mar 17, 1981Minnesota Mining And Manufacturing CompanyMultiple sheet sensor and deflector
US4395032 *Mar 9, 1981Jul 26, 1983Minnesota Mining And Manufacturing CompanyDocument feeder
US4618302 *Mar 5, 1984Oct 21, 1986Laurel Bank Machine Co., Ltd.Device for accumulating and delivering paper sheets
US4697944 *Dec 22, 1986Oct 6, 1987Ncr CorporationSheet feeding apparatus with cooperating endless belts
US4968023 *Jun 12, 1989Nov 6, 1990Monarch Marking Systems, Inc.Stacker
US5586708 *Jun 8, 1995Dec 24, 1996Automated Packaging Systems, Inc.Packaging machine feed mechanism
Classifications
U.S. Classification271/303, 271/198, 271/212, 226/172
International ClassificationB65H29/14, B65H29/00
Cooperative ClassificationB65H2301/42122, B65H29/14
European ClassificationB65H29/14