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Publication numberUS3613571 A
Publication typeGrant
Publication dateOct 19, 1971
Filing dateFeb 27, 1968
Priority dateFeb 27, 1968
Also published asDE1909736A1, DE1966351A1, DE1966352A1, DE1966352B2, DE1967107A1, DE1967108A1, DE1967109A1
Publication numberUS 3613571 A, US 3613571A, US-A-3613571, US3613571 A, US3613571A
InventorsBrown Gaylord W, Dorman Dennis J, Russell Edward J
Original AssigneeBrown Machine Co Of Michigan
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Container printing machine and method of printing
US 3613571 A
Abstract  available in
Images(15)
Previous page
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Claims  available in
Description  (OCR text may contain errors)

United States Patent [72] Inventors Edward J. Russell Gladwin; Gaylord W. Brown, Beaverton; Dennis J. Dorman, Coleman, all of Mich. [21] Appl. No. 708,690 [22] Filed Feb. 27, 1968 [45] Patented Oct. 19, 1971 [73] Assignee Brown Machine Company of Michigan, Inc.

Beaverton, Mich.

[54] CONTAINER PRINTING MACHINE AND METHOD OF PRINTING 40 Claims, 22 Drawing Figs.

[52] U.S. Cl 101/40, 101/247, 198/22 R, 214/1 BA, 214/1 BS, 279/3, l18/46,118/230,1l8/233 [51] Int. Cl B411 17/22, B65g 47/86 [50] Field ofSearch 101/38-40, 35, 247; 118/46, 230,500, 232, 233; 198/22, 25, 179, 210, 23, 20, 21; 214/1 B, 1 BS; 279/3; 271/56 [56] References Cited UNITED STATES PATENTS 3,016,153 1/1962 Porterfield 214/1 2,100,852 11/1937 .lacobson..... 101/137 3,330,400 7/1967 Alexander 198/22 3,398,678 8/1968 Usko 101/38 3,469,670 9/ 1 969 Cartwright 198/22 3,496,863 2/1970 Cvacho et a1. 101/40 2,198,565 4/1940 Schutz et a1. 101/40 X 2,345,870 4/1944 Guenther 101/40 UX 2,764,933 10/1956 Hargrave 101/177 X 2,770,347 11/1956 Porterfield 198/25 2,796,164 6/1957 l-lakogi 101/40 X 2,843,264 7/1958 Pfister 198/25 X 2,878,620 3/1959 Calehuff et a1 198/25 X 2,936,059 5/1960 Hakogi 198/22 X 2,936,701 5/1960 Stuchbery. 101/40 3,018,726 1/1962 Ethier 271/56 X 3,195,451 7/1965 Horekamp et al. 101/38 3,227,070 4/1966 Brigham et al.... 101/40 3,231,061 1/1966 Borkmann 198/25 X 3,250,213 5/1966 Brigham et al 101/40 3,251,298 5/1966 Rudolph et a1. 101/40 3,261,281 7/1966 l-lartmeister 101/40 X 3,279,360 10/1966 Smith et a1 101/40 3,300,019 1/1967 Brigham et al 198/25 Primary Examiner-Robert E. Pulfrey Assistant ExaminerClifford D. Crowder Att0rneyLearman & McCulloch ABSTRACT: High-speed printing or decorating apparatus capable of printing information and decoration in a variety of colors on container sidewalls and the like, and with quality halftones and fine type, including: a rotary mandrel drum having a series of circumferentially spaced mandrel lever assemblies with generally tangentially disposed, laterally projecting mandrels thereon mounted on each side of the drum in line with a rotary printing drum having offset printing blankets on its peripheral face which are revolved past the mandrel drum at a printing station; container supply and separating mechanism for individually moving containers to a position opposite the peripheral path of the mandrels; and endless transfer conveyor mounted opposite the peripheral path of travel of the mandrels and carrying cam-controlled pusher members which follow the arcuate path of the mandrels and at the same time move toward the mandrel drum to push containers endwise onto the mandrels upstream of the printing station; and endless transfer conveyor mounted opposite the peripheral path of travel of the mandrels downstream of the printing station and carrying cam-controlled suction cup, container removing members, for engaging the end walls of the containers, which follow the arcuate path of the mandrels and remain squared with the ends of the containers while pulling them endwisely off the ends of the mandrels and depositing them on discharge conveyor mechanism; valve mechanism for selectively communicating vacuum and air pressure sources with each mandrel for aiding in drawing the containers onto the mandrels and removing them therefrom; mechanism con nected with the valve mechanism and sensitive to atmospheric pressure at a time when the vacuum source is communicating with a particular mandrel to sense that no container is on the mandrel and to actuate a particular mandrel lever assembly to remove the mandrel from print position as it moves to the printing station; mechanism for supplying ink to the leading ends of the printing blankets and lacquer to the trailing ends thereof so that the ink applied may be immediately protected by a fast drying lacquer; and drive step means on the printing drum adjacent each blanket and of greater thickness than the blankets for spinning the containers through a controlled number of revolutions relative to the blankets when the mandrels reach the printing station.

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INVENTOR. EDWARD. J. RUSSELL GAYLORD W. BROWN DENNIS J. DORMAN ummw CONTAINER PRINTING MACHINE AND METHOD OF PRINTING One of the prime objects of the present invention is to design a continuous motion printing machine capable of printing containers at speeds which will permit the printing machines to be positioned in factory production lines with other machines for forming the containers and filling them with product.

Another object of the invention is to provide a high speed machine of the character described wherein transfer mechanism is provided for generallyhorizontally supplying and removing containers from mandrels which extend laterally from both sides of the mandrel drum so that two lines of containers may be simultaneously printed or decorated by the same printing drum in a continuous manner.

Another object of the. invention is to provide printing machines capable of running at speeds which may print containers at the rate of much as 400 per minute on each side of a mandrel drum having circumferentially spaced, laterally extending mandrels on each side, and wherein control of the containers is maintained at these speeds without touching the container sidewalls once they have been printed.

Still another object of the invention is to provide a highly reliable and efficient printing machine and method wherein a faster drying protective lacquer is immediately applied over ink printed on a container sidewall, after which removal of the containers from the mandrels is effected by gripping the bottom walls thereof.

Still a further object of the invention is to design a machine which can be economically manufactured and sold, considering the production which is obtained from it.

Other objects and advantages of the invention will be pointed out specifically or will become apparent from the following description when it is considered in conjunctionwith the appended claims and the accompanying drawings, in which:

FIG. 1 is an elevational view of one side of our printing machine, some of the parts being brokenaway or omitted in order to more clearly illustrate the mechanism;

FIG. 2 is a front elevational view taken onthe line 2-2 of FIG. 1 and again omitting some parts in the interest of clarity;

FIG. 3 is an opposite side elevational view taken on the line 3-3 of FIG. 2;

FIG. 4 is an enlarged, fragmentary; top plan view taken on the line 4-4 of FIG. 1 and illustrating mechanism for insuring a proper feeding of containers to star wheel mechanism which is used to supply the containers to a mandrel drum, the containers being omitted in the interest of better illustrating the mechanism; '1

FIG. 5 is an enlarged top plan view of a loading assembly illustrating the manner in which containers are loaded individually to support mandrels;

FIG. 6 is a side elevational view taken on the line 6-6 of FIG. 5 and illustrating push-on mechanism for positioning the container on the mandrels;

FIG. 7 is a still more enlarged, fragmentary, side elevational view of one end of the push-on mechanism taken on the line 7-7 of FIG. 5;

FIG. 8 is a fragmentary, side elevational view illustrating the manner of mounting the container supporting mandrels, taken on the line 8-8 of FIG. 9;

FIG. 9 is a sectional end view through one of the container supporting mandrel assemblies, taken on the line 9-9 of FIG.

FIG. 10 is a fragmentary, opposite, side elevational view taken on the line 10-10 of FIG. 9;

FIG. 11 is an enlarged, partly sectional, inverse plan view taken on the line 11-11 of FIG. 9, illustrating mechanism for preventing the mandrel from reaching the printing drum if a container is not on the mandrel; FIG. 12 is a fragmentary, side elevational view taken on the line 12-12 of FIG. 11;

FIG. 13 is an enlarged, fragmentary, end elevational view of the printing drum assembly, taken on the line 13-13 of FIG.

2; FIG. 14 is a sectional elevational view taken on the line 14-14 of FIG. 13, with parts omitted in the interest of clarity;

FIG. 15 is an enlarged, top plan view illustrating the printing blanket and mandrel drive strip; FIG. 16 is an enlarged, side elevational view of the container removing mechanism for pulling the containers individually off the mandrel, taken on the line 16-16 of FIG. 2;

FIG. 17 is a sectional, front elevational view taken on the line 17-17 of FIG. 16; FIG. 18 is an enlarged, fragmentary, sectional side view taken on the line 18-18 of FIG. 17;

FIG. 19 is an enlarged, transverse sectional view taken on the line 19-19 0fFIG.1;

FIG. 20 is a still more enlarged, sectional side elevational view taken on the line 20-20 of FIG. 19; FIG. 21 is a similar view taken on the line 21-21 of FIG. 19; FIG. 22 is a similar view taken on the line 22-22 of FIG. 19.

GENERAL DESCRIPTION Referring now more particularly to the accompanying drawings, and in the first instance to FIGS. l-3 thereof, the high speed, multicolor printing machine disclosed and to be described includes: a frame F; a pair of container supplying conveyor assemblies, each generally designated 10; a double star wheel container pickup train leading from each conveyor assembly 10 and generally designated 11; a mandrel loading assembly 12 on each side of the machine for transferring containers supplied by each star wheel train 11 to laterally extending individual mandrels on each side of a revolving mandrel drum assembly 13; a printing drum assembly generally designated 14 disposed in line" with the mandrel drum assembly and revolving in timed relation therewith to print the containers at a printing station S downstream of the mandrel loading assembly 12; a pair of mandrel unloading assemblies 15 (see FIG. 2) located on opposite sides of the mandrel drum assembly downstream of the printing station S; and a pair of laterally extending discharge conveyor assemblies, each generally designated 16. It is to be understood that a double line of containers is being supplied to and treated in the machine, which typically has a capacity in the neighborhood of 600 containers per minute. The machine is of the type which prints continuously such containers as vacuum formed oil cans, blown plastic bottles, and container halves which may be later joined by spin welding. While generally speaking the printing apparatus well adapted to the printing of synthetic plastic containers such as polyethylene, polystyrene and polypropylene containers, it is to be understood that containers of other material may also be readily printed by the machine. Also, while the machine is shown particularly as printing containers with cylindrical walls, by properly inclining or configuring the sides of the mandrel supports on which the containers are received it is possible also to print containers and like objects having tapering sidewalls or those which are oval in shape.

THE CONTAINER SUPPLY CONVEYOR ASSEMBLIES As particularly indicated in FIGS. l-3, each supply conveyor assembly 10 includes inner and outer side frame members 17 and 13, respectively, connected by braces 19. At its upper end each conveyor assembly 10 is adjustably supported by a bracket 20 from the machine base member 21. At its opposite end each downwardly inclined conveyor 10 is supported on baseplate 21. Since a pair of side-by-side supply conveyor assemblies 10 are employed, identical numerals are utilized to identify the identical parts thereof. Supported between the side frame members 17 and 18 are upper and lower roller members 23 and 24, respectively (see FIGS. 1 and 4), around which is trained an endless belt 25 moving in the direction of the arrow 0 in FIG. 1. Guide rail members 26 are secured to the side frame members 17 and 18 to guide the containers C in their path of travel downwardly from a suitable source of supply to the double star wheel mechanisms generally designated 11.

Provided forwardly of each belt 25 is a pair of transfer belts 27 traveling at a high rate of speed in the same direction of travel as belts 25 for the purpose of picking up containers C individually and moving them to the star wheel trains generally designated 11. The belts 27 are trained around pulleys 28 and 29 (see FIG. 4) mounted on a pair of shafts 30 and 31, respectively, which are journaled in bearings 32 provided on support arms 33 extending from the conveyor side rail members 17 and 18.

THE DOUBLE STAR WHEEL MECHANISMS The transfer belts 27, which are driven in a manner to be later described, spin the containers C in a counterclockwise direction, as shown at b in FIG. 1, up into the pockets 34 provided in the lower pairs of star wheel members 35, which, as FIG. 1 indicates, are being continuously revolved counterclockwisely in the direction d. Each pair of star wheel members 35 is mounted on a drive shaft 36 journaled in bearings 37 and 38 provided on opposite sides of a central frame member 39 disposed between the pairs of double star wheel assemblies 1 1.

Mounted above the pairs of star wheel members 35 and slightly forwardly thereof to receive containers C from the star wheel members 35 are pairs of star wheel members 40 which are similarly supported by a single shaft 41. The shaft 41 is journaled by bearings 42 and 43 on opposite sides of the frame member 39 and supports and pairs of star wheel members 40 on each side of the machine. An S-shaped guard rail 44 cooperates with a lower guard rail 45 and an upper guard rail 46 to maintain the containers C in proper position as they are moved along. Each of the guard rails 44-46 for each assembly 11 may be supported from the central plate 39 on cross rail members 46a from which extend support rods 46b. The lower and upper guard rails 45 and 46 maintain the containers C in the pockets 34 and 40a, respectively and the pairs of guard rails 44 on opposite sides of each assembly 11 maintain the endwise position of the containers C.

THE MANDREL LOADING MECHANISMS As FIG. I particularly indicates, the upper star wheel members 40 deliver the cans or containers C to a position in endwise alignment with the path of a series of circumferentially spaced container support mandrels 47 provided on each side of the mandrel drum assembly generally designated 13. In FIG. a container C is shown as having been moved to a position of alignment ate opposite a container support mandrel 47 to which it is to be transferred. As FIG. 1 indicates, the mandrels 47 are mounted on circumferentially spaced support arm assemblies 48 on the drum assembly 13, which is continuously revolved in the direction f shown in FIG. 1. To assist in moving the containers C continuously to the mandrels 47, identical pusher assemblies 12 are provided on each side of the machine which include upper and lower support plates 49 and 50, respectively (see FIG. 6), which are connected by shafts 51 journaled in bearings 52 provided on the members 49 and 50. Arm members 53, extending from tubular frame members 54, support the assemblies 12, there being arms 55 extending inwardly from the arms 54 to which adjustable clamp assemblies 56 mounted on the lower plates 50 are clamped.

As FIGS. 5 and 6 indicate, the pusher disk members 57, which are employed to push the containers C axially a part of the way in an endwise direction onto the mandrels 47, must move in a direction laterally inwardly toward the mandrels 47 at the same time they are following peripheral path of mandrels 47. Each pusher 57 is fixed on a threaded rod 58 adjustably received within a threaded opening in a block 59. The blocks 59 are mounted on vertical slide rods 60 which are supported for vertical sliding movement in slide bearing blocks 61 extending from Vertically extending U-shaped support frames 62 carried by upper and lower chains 63a and 63b. Angle straps 64 may be employed to secure the frame members 62 to the chains 63a and 6312 as FIG. 5 indicates, the chains 63a and 63b are trained around sprockets 65 and 66 on shaft members 51. The chains are guided by endless guide members 67 which preferably are suitable constructed of a hard-wearing plastic material such as nylon and are fixed to the plates 49 and 50.

As FIG. 5 indicates, the inclination of the runs of chains 63a and 63b is such that the disks 57 move endwisely the distance required to push the containers or cans C the required distance onto mandrels 47. As shown in FIG. 7, each of the rod members 60 is bored at one end, as at 68, to receive a coil spring 69 supported by a spring mount 70, and slide bushings 71 are mounted by the blocks 61 and 59 so that each rod 60 is slideable downwardly to the extent required. The normal upward position of each disk 57 is maintained by the spring 69, which urges each rod 60 upwardly against a stop or abutment 72 provided on each support frame 62.

Provided to move each disk 57 downwardly is a follower roller 73 mounted revolvably on a support rod 74 which extends into a bored opening 75 provide in the disk mount block 59 and an opening 600 in rod 60, and which is pinned to the rod 60 as at 76. To permit movement of each support rod 74 downwardly each support frame 62 is slotted as at 77. Each follower roller 73 follows the cam surface of an elongate, linear cam 79 supported from the top plate 49 by a brace 80.

THE MANDREL DRUM ASSEMBLY The drum assembly 13 includes a circular disk 81 fixed on a drive shaft 82 supported at its ends by bearing blocks 83 mounted on a frame member 84. The shaft 82 is driven by a pulley 85 by means ofa belt 86 in a manner which will be later described in the direction of rotation f. As shown particularly in FIGS. 8 and 9, each arm assembly 47a includes a pair of arms 87 fixed on opposite sides of the disk 81 and extending generally radially outwardly beyond the periphery of the disk 81. At their outer ends the arms 87 mount a pivot pin 88 on which each mandrel support arm 89 is pivotally received, as shown. Springs 90 secured to an eyebolt member 91 on the arm 87 of each arm assembly 47a and to a pin 92 on a clamp block 93 which is fixed to the pivot pin 88 normally maintain the arms 89 in the generally tangential position in which they are shown, a stop block 94 being provided to engage each block 93, as shown and thereby limit outward travel of the arms 89 which, like arms 93, are fixed to the pins 88. Each arm 89 supports a shaft 95 which, it will be observed, extends laterally from each side of an arm 89.

Pairs of inner and outer roller bearing 96 and 97, respectively, rotatably support and mandrel sleeve assemblies generally designated 98 which each include a pair of mandrels 47. The mandrels 47 may comprise aluminum blocks 99 on which resilient plastic liner sleeves 100 may be provided. The sleeves 100 are preferably constructed of synthetic rubber material of about 45-55 durometer rating and possess a certain desired resilience. To move the containers C the final increment onto the mandrels 47, vacuum is employed and a port 101 extending through the shaft 95 communicates with a vacuum passage 102 in each arm 89, as shown.

THE NO PRINT ASSEMBLY Normally, the mandrel drum assembly 13 is revolved in the direction f so that each mandrel assembly 98 is successively presented to the printing station S. The position of mandrel assemblies 98 is so adjusted that containers C on the mandrels 47 are engaged by the printing elements of the drum assembly 14 with adequate printing pressure and are revolved thereby so that the entire periphery of each container C may be printed. When inadvertently no container C is loaded to a particular mandrel 47, it is desirable to move the mandrel 47 inwardly toward the mandrel disk 81 away from print position so as to be certain to avoid printing the particular sleeve 100. To accomplish this, a no print" assembly is provided which moves the arm 89 in the direction necessary.

The no print assembly includes a sensing diaphragm assembly generally designated 103 having a diaphragm 104, as

shown in FIGS. 9 and 11,.dividing the device 103 into separate compartments 105 and 106. The compartment 105 connects, via a line 107, with the vacuum port 102 and is in turn connected via a line 107, with the vacuum port 102 and is in turn connected with a source of vacuum in a manner which will be described. The diaphragm 104 is connected to a rod 109 mounting a hardened bushing 110 which is receivable between a block 111 fixed to each'pivot pin 88, and a follower arm 112 which is pivotally received on each pin 88. Last motion mechanism is provided including a follower arm 112 having a portion 112a with'an opening 113 accommodating a return spring 114 which has is other end retained by a spring mount member 115 "on the block 111. At its opposite endthe follower arm 112 mountsa follower roller 116 adapted to engage a stationary cam 117 (see FIG. supported on an arm 118 on the frame member 84 adjacent the peripheralpath of the printing drum assembly14.

As each arm assembly 48 including each no print as sembly is revolved in the direction f in FIG. 1, follower roller 116 on follower arm 112 will engage behind the cam 117, as shown in FIGS. 1 and 10, and will pivot the follower arm 112 about pivot pin 88. If the machine is operating normally and containers C are mounted on each of the pair of mandrels 47 of a particular arm assembly 48, the vacuum condition will be maintained in line 107 and the diaphragm 104*will be in a position in which the diaphragm rod 109 is disposed in the position shown in FIG. 11. In this situation the follower arm 112 will pivot slightly relative to block 111 and when the roller 116 passes beyond cam 117 the spring 114 will return the follower arm 112 to position. Since the follower arm 112 is free to pivot wit respect to block 111 about shaft 88', the position of the support arm 89 and the mandrels 47 thereon will be unchanged and printing of the containers will proceed in the normal manner. However, if for some reason no container C is disposed on one of the mandrels 47, line 107 will be open to the atmosphere and the diaphragm 104 and'rod 109 will be moved to the right in FIG. 11 to a position between block 111 and follower arm portion 112a. When the vacuum condition in diaphragm chamber 105 isrelieved, the spring 119 forces the rod 109 to the right in FIGS. 9 and 11 to position and bushing 110 between the, block portion 112a and the block 111. Thus, when cam 117 pivots the follower arm 112, the bushing 110 on rod 109 prevents relative movement between the parts 111 and 112 and both parts 111 and 112 are pivoted. Since block 111 is fixed to the pin 88 by setscrew 120 (see FIG. 12), the pin 88 is pivoted, thus pivoting and moving the arm 89 and mandrels 47 in a direction i, as shown in FIGS. 8 and 12, away from the peripheral path of the printing drum assembly 14.

THE PRINTING DRUM ASSEMBLY The drum assembly 14 is particularly illustrated in FIGS. 1, 3, 13, 14, and and includes a pair of offset printing drums I21 rotatably supported on a shaft 122 journaled in bearings I23 on side frame members 124 for rotation in the direction j. Shaft 122 is driven by a pulley 125 by means ofa belt 126 in a manner which will be later described.

Mounted on the drums 121 are circumferentially spaced, offset printing blankets generally designated 127, each of which includes a leading ink-applying blanket portion 128 and a trailing lacquer-applying blanket portion 129. Provided adjacent each blanket 127 is a coextensive drive strip 130 (see FIG. 15) fabricated of the same blanket material but thicker so that it engages and drives the confronting mandrels 47. The blankets 127 are of such length relative to the peripheral speeds of the drums 121 and mandrel assembly 13 that each mandrel 47 preferably makes two revolutions as it passes a blanket 127. During the first revolution, the mandrel assembly 98 and the pair of containers thereon will move through one complete revolution and the containers will be printed over their entire circumferential surface by the blanket portion 128 in each color which is being used. As the printing drum assembly l4 and mandrel assembly 13 continue to move in the same direction of rotation about their axes (counterclockwisely in FIG. 1), lacquer is applied by the trailing blanket portions 129. The engaging surfaces of the blanket portions 128 are preferably so configured in the usual manner that one color never is in contact with another color and there is no mixing of the ink. In the machine shown, four colors are being applied and the polyethylene ink printed on the containers is being covered with a fast-drying clear, protective, polyethylene lacquer coating. Other compatible inks and lacquers may be used, dependent on the material from which the containers being printed are formed. The resilient blanket material employed (typically natural or synthetic rubber) is one which the ink and lacquer used do not attack.

Ink-supplying and blanket-coating assemblies generally designated 131-l34' for applying different colors of ink to each blanket portion 128 are depicted in FIG. 1 and the numeral generally designates a similar assembly which is employed, however, to apply the protective. lacquer to the portion 129 of each blanket 127. Because the lacquer can be dried of flash dried much faster than the ink, it is possible by coating the ink printing with lacquer to cut the drying time very considerably and thus greatly increase the number of containers which can be handled in a given period of time. The lacquer and ink used are immiscible in the sense that they do not mix with, dissolve in, or attack one another. The ink is in the form of a paste with a relatively high tack number (typically l230), while the lacquer is a free flowing liquid which, when applied, does not move or disturb the ink because of this difference in viscosity. Such inks are typically obtainable from lnterchemical Corporation of New York City, N.Y., U.S.A. Each blanket 127 prints all four colors and applies a coat of lacquer, and the number of blanket assemblies 127 on a given drum assembly 14 will be gauged to the relative speeds of rotation of mandrel assemblies 13, drum assembly 14, and the number of mandrel arm assemblies 48 carrying the containers which are to be printed.

As FIG. 14 indicates, the applying blankets 131b-135b on the colored ink-applying rolls 131a, 132a, 133a and 1340 and the lacquer-applying roll 135a extend only part way around the circumference of each roll and are so positioned that as the rolls l3la-135a are driven in timed relation to drums 121, the blanket 13Sb misses the printing drum blanket portions 128 and applies a lacquer coating only to the lacquer-applying blanket portions 129 while the blankets l31b-134b miss the printing drum blanket portions 129 and apply ink only to the portions 128. It is to be understood that applying assemblies 131-135 may be of the type mentioned in Jackson et al. US. Pat. No. 2,718,847, Munn US. Pat. No. 3,308,754, or Hovekamp US. Pat. No. 3,195,451, and since they form no part of he present invention will not be described in detail. The rolls 131a-135a are driven in a manner which will be described, in timed relation with the shaft 122 and at the same speed.

The printing pressure employed to print the colors on the containers during the first revolution thereof is the so-called kiss touch well known in the trade and during the second revolution of each container C a lacquer coating is wiper on by the blanket portions 129, which are identical in length with the blanket portions 128. Because the strips 130, while engaging mandrels 47, hold the containers C away from the surface of the blankets 127, smearing is avoided, each container C removing about one-half of the thickness of the lacquer coating on any given blanket portion 129.

THE CONTAINER UNLOADING MECHANISM As FIGS. 1 and 3 particularly indicate, mounted diametrically opposite each side of the printing drum assembly 14 is a container takeoff or unloading assembly generally indicated 15. As will later be explained, air under pressure is supplied through the mandrel ports 101 (FIG. 9) at about the time the containers reach an end stop and guide member 137 (FIG. 2)

supported by braces 138 from a vertical portion 139 of the frame F. The stop members 137 maintain the containers C on the mandrels 47 until such time as the containers C are brought opposite the takeoff assemblies 15, as indicated in FIG. 2, which then progressively remove them to the discharge conveyors 16.

Each takeoff assembly 15, as illustrated in FIGS. 1-3 and 16-18 particular, includes a pair of end frame members 140 supported by brace members 141 from the frame F. End frame members 140 journal a trio of shafts 142, 143 and 144 arranged in generally triangular disposition as shown in FIG. 17, and journaled by bearings 145 provided on the end frame members 140. The shaft 142 mounts a pair of space apart sprockets 146 and 147, the shaft 143 mounts a pair of sprockets 148 and 149, and the shaft 144 mounts a pair of sprockets 150 and 151. Trained around the sprockets 146, 148, and 150 is a chain 151a and trained around the sprockets 147, 149 and 151 is a chain 152. Mounted at spaced apart intervals on the chain 151a are special support links 153 and mounted on the chain 152 at spaced apart intervals are opposite support links 154.

A suction takeofi' assembly generally designated 155 is supported between each pair of links 153 and 154 and, as FIG. 18 indicates, includes a series of connecting strap members 156. Each strap 156 supports a pair of slide bearing blocks 158 with slide bushings 159. Mounted by the bushings 159 is a slide shaft 160 having an opening 161 at one end accommodating a return spring 162 which at its other end is secured by a spring mount member 163 on the strap 156. The spring 162 normally urges the slide shaft 160 to the right in FIG. 18 to a position in engagement with a stop member 164 provided on the strap 156. Rotatably mounted on each shaft 160 by bushings 165 and 166 are a follower arm 167 and a block 168 to which it is fixed, and it will be observed that the block 168 mounts a suction cup support block 169 to which a suction cup support block 169 to which a suction cup 170 is fixed as shown.

The follower arm 167 carries a follower roller 171, disposed to engage cam 172, which adjusts its position and that of suction cup 170 relative to the path of the container ends to keep it squared therewith for the time required for the suction cup to grip the container end. Because it is also necessary that the suction cups 170 remain aligned with the peripheral path of the containers C, an arm 173 carries a follower roller 173a which engages an elongate cam 174, as shown particularly in FIG. 16, which causes the shaft 160 to move axially in FIG. 18 to maintain this alignment. Adjacent the lower sprockets 148, 149 and 150, 151 is a lower cam 175 which is engaged by follower roller 171 to maintain the suction cup 170 squared with the traveling surface of the takeoff conveyor 16, the arm 167 and block 168 pivoting on shaft 160 as necessary to achieve an aligned position. A torsion spring 176 connected between the arm 173 and block 168 maintains the block 168 and arm 167 in a particular position in which the follower roller 171 engages cams 172 and 175 (FIG. 17). A slot 156a in each strap 156 and a slot 168a in each block 168 permit pivoting movement of the arms 167 and blocks 168 about shafts 160 relative to the straps 156 and arms 173, respectively.

Utilized in conjunction with each suction cup assembly 155 to selectively communicate with a vacuum source is a suction tube 177 leading to a suction cup 177a sealed over an opening 17717 provided in a belt 177c which is trained around upper and lower pulleys 178 and 179 mounted on shafts 142 and 143. Pulleys 178 and 179 are toothed to receive the timing belt 177a which has similar projections engaging between the teeth of the pulleys 178 and 179 so that no slippage of the vacuum belt 177:: occurs. The vertically inclined run of the belt 1770 extending between pulleys 178 and 179 travels along a vacuum manifold 180 having a continuous slot 18] extending between the pulleys 178 and 179. The vacuum source communicates with the cups.177a only along this run of belt 177a so that the cups 170 engage the ends of the containers C as they move around the pulley 178 and release the containers C as they move around the pulley 179. As FIG. 17 particularly indicates, the suction is released at the time each container C is deposited on a discharge conveyor 16 and thereafter the cups act to prevent the containers C from tipping as they proceed outwardly on the discharge conveyors 16. As FIG. 2 particularly indicates, each discharge conveyor 16 includes an endless belt member 182 trained around inner and outer roller members 183 and 184 on shafts 185 supported by conveyor side frame members 186. The vacuum chambers 180 are connected to the tubular frame members 54 by hose members 187.

MANDREL AIR AND VACUUM SUPPLY SYSTEM Provided to alternately and selectively apply air under pressure and suction forces to the mandrel ports 101 is an airvacuum valve assembly generally indicated by the numeral 188 (see FIGS. 1 and 19). The assembly 188 comprises a series of three disks 189, 190 and 191 which are respectively shown facially in FIGS. 20, 21 and 22. The tubular frame members 54 are connected with continuously operating vacuum pumps 192 (FIG. 1) via lines 193 (FIG. 2), and a line 194 leads from the frame member 54 to the plate 189 which is stationarily mounted by a bracket 195 connected to support 84. The bracket 195 also stationarily supports the disk 190. The disk 191, is, however, keyed as at 196 on the mandrel drum shaft 82.

Provided in the disk 189 is an opening 197 communicating with the vacuum line 194 and an opening 198 communicating with an air supply line 199. The opening 198 communicates with a slot 200 provided in the disk 190 and the opening 197 with a slightly longer slot 201 provided in the disk 190. Provided in the rotary disk 191 are a series of circumferentially spaced openings 202 which are peripherally disposed to rotate past the slots 200 and 201. Lines 108 (FIG. 9) connect each of the openings 202 with the line 107 leading to a particular mandrel shaft port 101.

THE DRIVE MECHANISM Mounted by a subframe assembly generally designated 203 is a drive motor gear box assembly 204 for driving the various operating elements of the machine. As FIG. 1 indicates, the motor 204 has an armature shaft 205 mounting a gear 206 which drives a gear 207 on a jack shaft 208 journaled by bearings 209 from a support block 210. At its opposite end, shaft 208 is connnected to a gear box 211 supported in any convenient fashion from the machine frame F. The gear box 211 has a vertically extending drive shaft 212 extending to a second gear box 213 having a pair of lateral output shafts 214 and 215 (see FIG. 2). Shaft 215 extends to another gear box 216 having an output shaft 217. A second output shaft 216a extending from gear box 216 is coupled to shaft 144 driving the one container takeoff assembly 15. The shaft 217 extends through a gear box 218 having a downwardly extending output shaft 219 leading to a gear box 220 which has a lateral output shaft 221 driving one of the discharge conveyors 16, as shown in FIG. 2. A sprocket provided on the output shaft 221 drives the outer shaft 185 by means of a chain 222.

The output shaft 214 extends across to the gear box 223 which has the output shaft 218 coupled to and driving the shaft 144 of the left takeoff assembly 15 in FIG. 2. The gear box 223 also has an output shaft 224 extending outwardly to a gear box 225. Extending downwardly from the gear box 225 is a drive shaft 226 which extends to a gear box 227 having an output shaft 228 driving the outboard discharge conveyor shaft 185 through a similar chain and sprocket assembly 222.

The motor gear box assembly 204 also has an output shaft 229 with a pulley 230 mounted thereon driving a pulley 231 mounted on a shaft 232 via a belt 233. The shaft 232 is coupled to the input shaft of a gear box 234 which has an output shaft 234a with a pulley 235. thereon driving a pulley 236 through a belt 237. The pulley 236 is mounted on a shaft 238 having a sprocket 239 thereon which drives a jack shaft 240 through a chain 241 trained around a sprocket 240a. The jack

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Classifications
U.S. Classification101/40, 414/737, 118/46, 198/471.1, 198/487.1, 279/3, 118/233, 414/728, 101/247, 118/230
International ClassificationB65G47/86, B41F17/08, B41F17/22, B41F17/00
Cooperative ClassificationB41F17/002, B41F17/22
European ClassificationB41F17/00B, B41F17/22
Legal Events
DateCodeEventDescription
Dec 24, 1981ASAssignment
Owner name: LEESONA CORPORATION, A CORP. OF MASS.
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:KOEHRING COMPANY;REEL/FRAME:003954/0491
Effective date: 19751212
Owner name: LEESONA CORPORATION, A CORP. OF MASS., MASSACHUSET
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:KOEHRING COMPANY;REEL/FRAME:003954/0491
Jun 8, 1981ASAssignment
Owner name: LEESONA CORPORATION
Free format text: CHANGE OF NAME;ASSIGNOR:JOHN BROWN INDUSTRIES LTD.;REEL/FRAME:003936/0238
Effective date: 19810331
May 15, 1981ASAssignment
Owner name: JOHN BROWN INDUSTRIES LTD.; 100 WEST TENTH ST., WI
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:LEESONA CORPORATION; 333 STRAWBERRY FIELD RD., WARWICK, RI. A CORP. OF MA.;REEL/FRAME:003936/0206
Effective date: 19810501