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Publication numberUS3345801 A
Publication typeGrant
Publication dateOct 10, 1967
Filing dateJan 4, 1965
Priority dateJan 4, 1965
Publication numberUS 3345801 A, US 3345801A, US-A-3345801, US3345801 A, US3345801A
InventorsWest John B
Original AssigneeMaryland Cup Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Auxiliary unit for packaging machine
US 3345801 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

Oct. l0, 1967 J. B. WEST 3,345,801v I I AUXILIARY UNIT FORPACKAGING MACHINE I Filed Jan. 4, 1965 y 4 1l SheetsShet 1 FIG. 1.

FIG. 2.

JOHN B. WEST INVENTOR @mi b- Oct. 10, 1967 J. B. wEsT AUXILIARY UNIT FOR PACKAGING MACHIN Sheets-Sheet 2 Filed Jan. 4, 1965 INVENTOR .JOHN B, wEsT ATTORNEY Oct. 1.0, 1967 1. B. WEST` `3,345,801

AUXILIARY UNIT FOR PACKAGING MACHINE Fi1ed Jan. 4, 1965 l 11 sheets-sheei s INVENTOR JOHN B. WEST ATTORNEY 0t.1o,19s7 l J. B. WEST 3,345,801

AUXILIARY UNIT FOR PACKAGINGMACHINE Filed Jan. 4, 1965 1l Sheets-Sheetl 4 FIG. 8.

FIG; 9.

INVENTOR JOH N B. WEST ATTORNEY Oct. 10, 1967 J. B. WEST AUXILIARY UNIT FOR PACKAGING MACHINE ,11 Sheets-Sheet 5 Filed Jan. 4, 1965 WH lllllll-Hll M INVENTOR JOHN B. wEsT Il IHIIIH Nawal/f g 1W ATTORNEY oct. 1o, 1967 J4. B. WEST 3,345,801

AUXILIARY UNIT FOR PACKAGING MACHINE Filed Jan. 4, 1965 l1 Sheets-Sheet 6 FIG. Il.

INVENTOR JOHN B. wEsT ATTORNEY Och l0, 1967 J, :B WEST v 3,345,801

' AUXILIARY UNITFOR PACKAGING MACHINE Filed Jan. 4, 1965 v 1l Sheets-Sheet '7 F|G. I4. JOHN a. wEsT Y Wy. 2W


Filed Jan. 4, 1965 y lau-u wf n M mm mi R. m 1l .f M Ws K 1w d N 7 H :Q Y 4,. \\\A w 5 \\\\w- .//wv/// n lu. F @fn mwmmvm- J L g 6 w w 5 9@ f 7| O 7 M,// 5 6 V. L KWK w Lm 5 /2 E @www NL 6 w n ///V///f///////// O FIG ATTORNEY AUXILIARY UNIT FOR PACKAGING MACHINE Filed Jan. 4, 1965v ll Sheets-Sheet 9 FIG. I9.


ATTORNEYv ll Sheets-Sheet 1C)` Oct. l0, 1967 .1. B. WEST AUXILIARY UNIT FOR PACKAGING MACHINE Filed Jan. 4, 1965 ATTORNEY Oct. 10, 1967 J, B, WEST 3,345,801

AUXILIARY UNIT FOR PACKAGING MACHINE Filed Jan. 4, 1965 ll Sheets-Sheet 1 l INVENTOR JOHN B. wEsT ATTORNEY United States Patent O 3,345,801 AUXILIARY UNIT FOR PACKAGING MACHINE .lohn B. West, Pikesville, Md., assignor to Maryland Cup Corporation, Owings Mills, Md., a corporation of Maryland Filed Jan. 4, 1965, Ser. No. 423,112 3 Claims. (Cl. 53-311) This invention relates to packaging machines and it is more particularly concerned with devices adapted to be yattached to a packaging machine for the purpose of feeding lids of containers to a point where the lids can be secured in position on the containers after being filled with various products, such as ice cream, cheese, sour cream, et cetera.

In copending patent application, Ser. No. 292,359, there is described a machine for packaging food products which Icomprises: horizontal loading wheel having a series of crcumferentially arranged apertures adapted to support open containers to be filled, a vertical cylindrical sleeve concentrically secured to the wheel, means for rotatably supporting the sleeve, a shaft rotatably mounted in the sleeve coaxially, means for rotatably supporting the shaft and one or more driving gears -connected to the shaft and ,sleeve` adapted to drive auxiliary units, of the machine. Means are yalso provided for connecting a source of power to intermittently rotate the sleeve and continuously rotate the shaft. The gear means are contained in housings having openings through which driven gears can be meshed with the driving gears for powering the auxiliary units. One of the objects of the present invention is the pro- Vision of auxiliary units that can be attached to and supported by a'machine of this general type and engaged with the driving mechanism thereof at one or more points for the purpose of feeding container lids of various kinds to the loading wheel at selected stations and for securing the lids on the containers as the containers pass through the station.

Another object of the invention is the provision of such auxiliary units which can function with various types of lids including:v (l) flanged, non-nestable type lids; and (2) lids which can be provided in the form of a stack and from which they can be withdrawn one by one.

A further object of the invention is the provision of means capable of receiving certain lids in a haphazard relation relative to each other and orienting them for correct disposition to be fed to the station where they are to be applied to the containers.

A still further object of the invention is the provision of auxiliary units which are rugged in construction, dependable in operation, whichare long-wearing and which are not likely to get out of working order during prolonged periods of use.

These and still further objects, advantages and features of the invention will be apparent from the following description considered together with the accompanying drawing.

In the drawing:

FIGURE l (sheet 1) is a front elevational view of one embodiment of the invention attached to the basic packaging machine, the latter being partly broken away.

FIGURE 2 (sheet 1) is an elevational view, partly broken away, of a filled container having a lid thereon of the general type employed in the first embodiment as the same would appear after ybeing operated upon by the embodiment.


FIGURE 3 (sheet 2) is a top plan View of the embodiment of FIGURE l, partly broken away.

FIGURE 4 (sheet 3) is a side elevational view, partly broken away, of the same embodiment taken from the right side of FIGURE 1.

FIGURE 5 (sheet 2) is a fragmentary side elevational view of the embodiment taken from the left side of FIG- URE l.

FIGURE 6 (sheet 3) is a sectional view along the line 6 6 of FIGURE 4.

FIGURE 7 (sheet 1) is a sectional view along the line 7 7 of FIGURE 4.

FIGURE 8 (sheet 4) is a sectional view along the line 8-8 of-FIGURE 3 showing the escapement mechanism in its holding position.

FIGURE 9 (sheet 4) is a view similar to FIGURE 8 with the escapement mechanism in a release position.

FIGURE 10 (sheet 5) is a vertical sectional view of the embodiment, generally on a larger scale, showing the feeding mechanism in one of its two extreme positions.

FIGURE ll (sheet 6) is a view similar to FIGURE 10 with the mechanism in the opposite extreme position.

FIGURES l2 yand 13 (sheet 7) are fragmentary views showing portions of FIGURES l0 and l1 relating to the feed stopping mechanism in its locked and unlocked positions, respectively.

FIGURE 14 (sheet 14-14 of FIGURE l2.

FIGURE 1S (sheet 15-15 of FIGURE 12.

FIGURE 16 (sheet 16-16 of FIGURE l0.

FIGURE 17 (sheet 8 17-17 of FIGURE 10.

FIGURE 18 (sheet 8) 13-18 of FIGURE 10.

FIGURE 19 (sheet 9) is an elevational view similar to FIGURE 1 illustrating a second embodiment of the invention.

FIGURE 20 (sheet 9) is an elevational view of a group of stacked lids partly in section of the type with which the second embodiment of the invention is adapted to function. f

FIGURE 2l (sheet 10) is a sectional view along the line 21-21of FIGURE 19.

FIGURE 22 (sheet l0) is a side elevational view of the second embodiment from the right side of FIGURE 19. FIGURE 23 (sheet 1l) is a vertical sectional view, generally, of the second embodiment, with some parts removed and with the mechanism in its open position for receiving a lid to be secured on a container.

FIGURE 24 (Sheet 11) is a view similar to FIGURE 23 with the mechanism in position to seat a lid on the container.

FIGURE 25 (Sheet 9) is a sectional View along the line 25-25 of FIGURE 2l.

Referring with more particulari-ty to the drawings, in which like numerals designate like parts throughout the Various figures, the embodiment illustrated in FIGURES 1-18 is adapted to the machine described in application for patent, Ser. No. 292,359, filed July 2, 1963, Patent No. 3,225,889, to which reference is made for a complete description. In general, however, the machine of said `prior application comprises a loading wheel 30` provided with apertures 31 for holding containers 32 of the tapered 7) is a section `along the line 7) is a section along the line 8) is a section along the line is a section along the line is a section .along the line open top type to be filled and capped at various stations defined by auxiliary units attached to the machine. A housing 33 below the loading wheel 30 contains a driving gear 34.

Another driving gear 35 is contained in a housing 36 above the loading wheel 30. The housings 33 and 36 are structurally capable of supporting the auxiliary equipment which comprise embodiments of the present invention hereinafter described.

An upper housing 37 is disposed on the top of the upper housing 36 and secured by bolts 38. On the interior of the housing 37 is a vertical barrel cam 39 secured to a vertical shaft 40 for rotation therewith. The shaft is rotatably mounted in bearings 41 and 42 and its lower end is provided with a pinion 43 which meshes with the driving gear 35. The barrel cam 39 has a peripheral camming groove 44 which receives a cam follower in the form of a roller 45 mounted on a crosshead 46. The crosshead is securely clamped to vertical reciprocating shafts 47 within the housing. The lower ends of the shafts 47 extend downwardly through the housing 37 to the exterior thereof and are fixed to a horizontal arm 48 to the outer end of which a pressure pad 49 is attached in alignment with an aperture 31 at the lidding station where the lids are placed on the containers.

To the lower housing 33 there is attached another portion of the device in the form of a housing 50. The housing 50 contains a rotary cam 51 mounted on a vertical shaft 52 for rotation therewith. A gear 53 is integral with the cam 51 for rotation therewith. The shaft 52 is rotatably mounted in bearings 54 and 55 and is driven through the gear 53 by means of an idler or reversing gear 56 in meshed relation with it and with the driving gear 34.

A cam follower in the form of a roller 57 engages the upwardly facing camming surface 58 of the cam 51. The roller 57 is mounted on a crosshead 59 that is secured to a pair of vertical reciprocating shafts 60. The crosshead 59 is biased downwardly by a coil spring 61 disposed between a retaining well 62 therein and a well 63 thereabove in the housing 50. The upper ends of the shafts 60 project upwardly through the housing 50 to which a pedestal carrier 64 is removably attached by means of bolts 65. This carrier is adapted to support one or a pair of pedestals, such as the pedestal 66, through its stem 67 set in a socket 68 of the carrier and releasably secured to it by a set screw 69.

The pedestal 66 is adapted to engage the bottom of a lled container 32 carried by the wheel 30 and elevate it to a position for receiving a non-nestable lid 70 according to the rst embodiment from the lid feeding mechanism hereinafter more fully described.

To the lower end of the shaft 52 there is secured a horizontal crank arm 71. The outer end of the arm 71 has a vertical pin 72 which engages a socket 73 at one end of a connecting rod 74. The opposite end of the connecting rod is connected by a pin 75 to the arm 79 of a crosshead 76 which slidably reciprocates on a pair of ixed horizontal shafts 77.

The arm 79 slidably engages and extends outwardly through a block 78 attached to the housing 50. The lower ends f a pair of levers 80 are pivotally connected to the arm 79 at 81. The levers 80 .are fulcrumed on a horizontal transverse shaft 82 rotatably supported on side walls 83 and 84 that comprise a housing for the upper part of the levers. The levers are tied together for comovement by a connecting block 85 and bolts 86.

The upper ends of the levers 80 are each provided with open slots or notches 87 to releasably engage the outer ends of a latch pin 88 carried by a lever 89 on a pivoted arm 90. The arm 90 is straddled by the levers 80 and its lower end is pivoted on the same shaft 82 to which the levers 80 are fulcrumed. (See FIG. 14.)

The pin 88 has a limited longitudinal movement relative to the arm 90 by virtue of a slot 91 through which it is disposed and it is biased to the lower position in the slot by means of a coil spring 92 connected at one end to the lever 89 and at its other end, to a point 93 on the arm 90.

The upper end of the arm carries rollers 94 which engage a vertical slot 95 in a carrier 96 slidably mounted on a pair of parallel bars 97 fixed to structural members 98 and 99.

When the levers 80 are latched to the arm 89 by engagement of the pin 88 in the notches 87, reciprocation of the arm 79 causes co-oscillation of the arm 90 and levers 80 to cause the carrier 96 to reciprocate on the bars 97. However, when the levers 80 are unlatched from the arm 98 by disengagement of the pin 88 from the notches 87, oscillation of the levers 80 is not transmitted to the arm 79, thereby resulting in an arrest of movement of the carrier 96.

Disengagement of the pin 88 with the notches 87 is effected by means of a bell crank 100 pivoted on a shaft 101. The upper arm 102 has a camming edge 103 adjacent to a notch 104. In its upper position, as shown in FIG. 13, the camming edge 103 is in alignment with the path of movement of the pin 88 whereby, as the pin contacts the edge 103, it is moved upwardly out of the notches 87 against the force of the spring 92 and is seated ou the notch 104. When the bell crank is in its lower position, as shown in FIG. l2, camming edges 105 of the oscillating levers 80 force the pin 88 into the notches 87.

The bell crank 100 is lifted to its uppermost position by an ecentric cam 106 mounted for rotation on a crank shaft 107. A crank arm 108, attached to the crank shaft, is disposed on the outside of the wall 84 in a position accessible to the operator. In the upper position of the cam 106, it holds the bell crank in an elevated position to raise the arm 102 to the unlatched position. In the lower position of the cam 106, the upper arm of the bell crank is lowered first under the force of the spring 92 acting against it through the pin 88, and then under the force of gravity alone. The cam 106 can be held in the upper position by a set screw 109.

The carrier 96 supports a platen 110 which is slidably mounted in a recess 111 of a platform 113. The platform 113 is mounted on posts 114, and the platen 110 is connected to the carrier 96 by means of pins 115 passing through slots 115A of the platform and engaging apertures 116 of the carrier. The platform 113 extends inwardly over the apertures 31 of the loading wheel 30, and is provided with a discharge opening 117 for the lids to be placed on the containers. The opening 117 is aligned with the container supporting pedestal 66.

The lids 70 are placed one at a time in a position on the platform 113 by means hereinafter described, and they are fed to the opening 117 by engagement with the inner edge 118 of the reciprocating platen 110.

The lids reach the platform by means of a chute the lower discharging end being disposed on one side of the platform. The chute is formed of a pair of bottom arcuate rods 119 and 120 and a top arcuate plate 121 in spaced relation to the rods. The upper end of the chute is opened to the inner end of a semi-cylindrical cradle 122 formed of separate stationary frame rods 123 connected with suitable strutsand a pair of diametrically opposed parallel feed rollers 124 and 125 mounted as a unit on the frame structure 126 and attached to the platform 113 by bolts 127.

The rollers 124 and 125 are mounted on suitable bearings 128 and 129, respectively, of the frame structure and are connected at their outer ends to pulleys 130 and 131. These pulleys are driven by a belt 132 engaging the takeoff pulley 133 of an electric motor 134 mounted on and carried by the frame structure by bolts 135. One or both of the rollers is provided with a raised helical configuration 136 on the surface thereof, whereby when lids 70 are placed in the trough, they are forced thereby toward the inner end into the chute.

Contact with the rotating rollers 124 and 125 by the lids 70 also results in their proper orientation in vertical planes at right angles to the longitudinal axis of the cradle so as to properly enter the chute. Thus, lids placed in thechute in generally disoriented positions are urged to a vertical position of proper orientation for reception by the chute.

Lids falling in the chute are controllably discharged one by an escapement mechanism which comprises a transverse detent 137 at the end of an arm 138 carried by a rocker shaft 139. The rocker shaft is supported on bearings 140 and 141 and has a crank arm 142 on one side provided with a cam plate 143 in alignment with the path of travel of a roller 144 mounted on the reciprocating platen 110.

Due to the reciprocation of the platen 110, the roller 144 is brought into contact with the cam plate 143 cyclically to raise the plate and thus oscillate the rocker shaft 139 and the detent 137 to which it is attached. This has the effect of periodically releasing one of the lids 7i) which are normally held in the chute by the detent (see FIGS. 8 and 9). The cam plate 143 is biased y to the lower position by means of a spring 145 attached at one end to a stationary point 146 of the frame and at the other end to a rocker arm 147 of the rocker shaft 139.

An upper detent for the lids at the discharge end of the cradle 122 is provided in the form of a horizontal bar 148. The bar 148 is secured to one end of a radial arm 149; the other end of the arm being secured to a rocker bar 150 of a shaft 151 by a bolt 152. The shaft 151 is mounted in bearings 153 and 154 in frame numbers 155 and 156 respectively.

One end of the shaft 151 is bent to form a crank arm 157 which is pivotally connected to one end of a connecting rod 158. The opposite end of the rod 158 is connected in a special Way to a rocker arm 159 of the rocker shaft 139. The outer end of the arm 159 has an eye 160 through which the rod 158 is slidably engaged. An abutment 161 is fixed to the rod 158. The rod 158 carries a coil spring 162, concentrically, which is held in position by a nut 163 and tensioned to urge the arm 159 in contact with the abutment 161.

By these means oscillation of the rocker shaft 139 is effected to oscillate the detents 137 and 148 and effect an escapement of lids 70 one at a time from the cradle 122 into the chute and from the chute onto the platform 113. Each lid on the platform is moved by the leading edge 118 of platen 110 to a position over the discharge opening 117 and is pressed on to an underlying container 32 on the pedestal 66 by the pad 49. The pedestal 66 is elevated by the mechanism to which it is attached, described above, suflcient to raise the rim of the container 32 above the loading wheel 30 so that the lid may be pressed down far enough without being interfered with by the loading wheel (see FIG. 11). At this station also the side of the container, at a point just below the loading wheel 30 is pressed inwardly by a pressure bar 164 to cause a slight deformation in the container sufcient to effect a release of the trapped air therein and thereby preventing the lid from popping off after the container is discharged from the machine.

The pressure bar 164 is supported along the side of the locus of a container 32 resting 0n the pedestal 66 by means of a bracket 165 attached to the platform 113 by bolts 166. v

A plate 167 is integral with the bracket 165 and extends over the platform 113 on the side opposite the cradle 122 to engage the top of the lids 70 as they are vdisposed on the platform, thereby retaining them in a proper horizontal position until they reach the discharge opening 117 (see FIG. 9). A group of pins 1'68 is attached to the bottom of the platform 113 about the opening 117 the purpose of which is to frictionally engage the periphery of the lids and prevent them from slipping through under the force of gravity until positively forced through by pressure kfrom the pad 49. In this way, proper orientation is maintained of the lids for application to the container.

In FIGS. 19 .to 24, there is illustrated another embodiment of the invention for use with nestable lids 169 that are capable of being arranged in a stack with the bottom-most lid of the stack being removable by lateral displacement. This embodiment is essentially the same as the rst, except as indicated hereinafter, and to the eX- tent that these embodiments are the same, like numerals are used in the drawing to designate like parts. The modication consists essentially of dispensing with the cradle 122 of the first embodiment together with the auxiliary escapement mechanism and in place thereof substituting a vertical lid rack 170 comprising a group of spaced vertical bars 171 for holding the stack of lids 169 directly over the platform 113 in front of the edge 118 of the reciprocating platen 110 when in its retracted position. The bars 171 are supported on brackets 172 and 173 attached to -the platform 113 by bolts 174 and 175 in a horizontal plane above the platform and spaced from it a distance substantially equal to the thickness of one of the lids 169, whereby the lowermost lid of the stack of lids can be moved laterally by protraction of the reciprocating platen 110 while the remaining lids of the stack thereabove are restrained Iby the bars 171.

A portion 176 of the pressure pad 49 in this embodiment is cut away to accommodate the lids in their proximity.

A further modification of this second embodiment involves the elimination of the pressure bar 164 of the rst embodiment and providing instead a pair of lobes 177 and 178 between which the containers are carried by the wheel 30 after the lids have been applied. These lobes are carried at the opposite ends respectively, of a rod 179 which rod is in turn supported on a cantilever bracket 180 secured to the platform 113 by bolts 181. The lobes are effective to push the walls of the container inwardly on opposite sides adjacent the lid to cause air pressure inside the container to be released.

Having thus described my invention, I claim:

1. A machine having a rotatable horizontal wheel, said wheel having openings for supporting open top tapered containers and for carrying them stepwise to a station for the disposition of closure lids on the containers, a holder for a group of closure lids, means for separat- -ing a lid of the -group and moving it from the holder to a position above the container, means for moving the lid `and container held in the opening at the station relative to each other to effect mutual engagement, and a pressure bar adjacent said station, said bar being adapted to engage and deform a portion of the wall of the container adjacent the lid so as to release from the container entrapped air under pressure.

2. A machine for applying lids to containers comprising a container supported at a defined station, a holder for a group of container lids, means for selectively feeding the lids one by one from the holder, a platform overlying the container support for receiving lids fed from the holder by said means, a lid retaining plate overlying the platen on the side opposite the holder to slidably engage the -top of lids as they are received by the platform, a reciprocatable platen overlyin-g said platform, said platform having an opening for the discharge of lids received by the platform, means for reciprocating the platen to move the lids on the platform over said opening, detents adjacent -the opening to contact the edges of the lids in said opening and restrain them frictionally -from passing therethrough under the force of gravity alone, a reciprocating pedestal for engaging and elevating on its upward stroke the container relative to the wheel, a reciprocating pressure pad above the pedestal for engaging on its downward stroke the lid in its position above the container and means for actuating and for synchronizing the reciprocating movements of the pedestal and pad so that the pad moves downward when the pedestal moves upward to effect an engagement of the container with the lid, said means for reciprocating the platen being in synchronization with the movements of -tlhe pedestal and pad to cyclically position a lid in the opening of the platform.

3. A machine as defined by claim 2 in which the means for reciprocating the platen comprises a reciprocating shaft, an unconstrained linkage connecting the shaft with the .platen and means for constraining the linkage while the reciprocating shaft is in motion to cause transmission of motion from the shaft to the platen.

References Cited UNITED 8/1913 l/1935 12/1941 l/l956 10/1957 11/1962 2/1964 6/1964 STATES PATENTS Hartwig 53-310 Geyer 53-310 Blann.

Annen 53-306 Dimond 53-306 Carew et al. 53-306 X `R-unco 53-313 X Decker et al 534-316 GRANVILLE Y. CUSTER, IR., Primary Examiner.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1069948 *Oct 8, 1912Aug 12, 1913Frederick G ZinsserBottle-capping machine.
US1989039 *Apr 15, 1932Jan 22, 1935Filler Machine Company IncCapping mechanism
US2264738 *Mar 26, 1940Dec 2, 1941Lily Tulip Cup CorpMachine for applying closures
US2732114 *May 14, 1951Jan 24, 1956 Machine for
US2810248 *Feb 8, 1955Oct 22, 1957Cons Packaging Machinery CorpCapping machine
US3061987 *May 25, 1960Nov 6, 1962American Can CoContainer capping mechanism
US3121984 *Mar 22, 1961Feb 25, 1964Anchor Hocking Glass CorpCap brake for sealing machine
US3137982 *May 5, 1961Jun 23, 1964Bopp Decker Plastics IncContainer capper
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3408789 *Mar 21, 1966Nov 5, 1968Anderson Clayton & CoCap applying method and apparatus
US3495252 *Dec 28, 1966Feb 10, 1970California Date Growers AssLidding machine
US4121402 *Mar 10, 1976Oct 24, 1978Maryland Cup CorporationMethods and means for manufacturing foam plastic containers and sidewall blanks for same
US4531342 *Sep 9, 1982Jul 30, 1985Wittenborgs Automatfabriker A/SCup dispenser for cups containing freshly made beverages
US4594838 *Oct 12, 1984Jun 17, 1986Unidynamics CorporationCapping method and apparatus for a beverage vendor
EP0004971A1 *Apr 18, 1979Oct 31, 1979Maryland Cup CorporationEquipment and method for forming cylindrical blanks
U.S. Classification53/311, 53/510, 53/313
International ClassificationB65B7/28
Cooperative ClassificationB65B7/2807, B65B7/2842
European ClassificationB65B7/28F, B65B7/28B
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Apr 6, 1990ASAssignment
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Feb 13, 1990ASAssignment
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Effective date: 19861231
Effective date: 19830831
Effective date: 19841231