US2261990A - Device for lining closures - Google Patents

Description

Nov. 11, 1941.

' H. E. GERLITYZKI) DEVICE FOR LINING cflosu'nEs Filed Dec. 31, 1938 Patented Nov. 11, 1941 para STATE OFFICE DEVICE-FOR LINING CLQSURES Harry E. Gerlitzki, Lancaster, Pa, assignor to Armstrong Cork Company, Lancaster, Pa a corporation of Pennsylvania Application December 31, 1938, Serial No. 248,859

3 Claims. (Cl. 113-80) My invention relates to a device for lining closures and more particularly to a device for posi tioning liners in scew threaded closures so as to insure proper adhesive securement of the liner to the closure throughout substantially the entire extent of the area of contact therebetween.

It is well known that in the manufacture of molded closures, particularly in the larger sizes. there is considerable warpage of the head portion of the closure resulting in the creation of a slightly concave or domed inner head surface. Even in the smaller sizes this action will cause the inner surface of the head portion to be elevated out of its normal plane from .005" to .010". This necessitates that the liner be properly deformed out of its normally flat shape to assume the same contour as the head portion, to insure a satisfactory securement by the adhesive disposed between the closure and a liner. Another problem arises in closure assembly by reason of the screwthread iormations on'theinner surface of I the skirt of the closure. In order to insure prop-.

er sealing, the liners are generally of greater ex ternal diameter than the internal diameter of the skirt at the screw threads and this often results I.

in the liners being deformed or held by the screw thread projections ;against proper engagement with the head of the closure. This problem exists in both molded and metal screw thread closures and the problem of securing a flat disk-' like liner to a'concave surface arises in molded closures for the reasons advanced above and in metal closures having adomed head surface for purposes of appearance. i

Heretofore, in the lining of such closures, it

has been common practice to place a drop of ad hesive in the central portion 0mm closure and then press theliner with a flat pressing surface. This operation has been generally unsatisfactory since considerable adhesive mustbe used inorder to fill the gap which exists between fthe i domed inner head surface and the flat surface of the disk-to be secured thereto.

According to my invention, I provide a device which isadapted to engage the central portion of the liner, leaving the edge portion free for deformation, and to urge the central portion of the liner into engagement with the head of the 010- sure throughout its extent, the liner engaging surface of the pressing device being contoured to substantially he contour of the inner'surface of thecl'osure in its corresponding area." The device is so constructed and arranged that, after the initial pressing of the central portion of the liner into proper position, an auxiliary pressing surface engages the edge portion of the liner urging it into proper engagement with the head of the closure, overcoming any tendency for. the liner to be improperly aligned by'reason' of en--" gagemenifwith the screw thread formations or by reason of deformation of the peripheral portion of the liner effected by the initial deformation of the central portion thereof.

In the drawing forming a part of this application, there is shown a view, somewhat diagrammatic, of the lining device of my invention mounted upon the reciprocating arm of a closure lining machine.

Referring to the drawing, there is provided a support 2 for the closure to be lined. This may take the form of an index wheel for conveying the closure intermittently into various stations such as the glue applying station, the liner punching station and the liner pressing station I shown in the drawing. There is shown a ,molded 1 closure 3 positioned on the support 2 which closure is provided with screw thread-formations l molded in the skirt 6 thereof. The head or top portion. I of the closure at its inner surface is slightly'concave and a sealing liner I of cardboard, cork, or the like, is shown in position in engagement with the entire inner surface of the head 6. It will be noted that the outer diameter of the liner I is of greater diameter than the inner diameter of the screw thread'formations 4 so I that the liner I must be slightly deformed at its periphery so as to pass to its final position beyond the thread formations 4. As a result of this deformation, the liner .I 'does not properly engage the head portion 6 throughout the extent of its inner surface.

The lining device proper is shown in partially depressed position in the drawing.' The device comprises a supporting pin ,8 which is secured to supporting pin 8 is provided with ashoulder l3 and is reduced in diameter therebelow in the area it, the end of the reduced portion slidably projecting into an opening in a primary pressing member supporting casing i5. Alocking pin i6 is secured to the projecting end I of the supporting pin 8 and operates within a slot l1 provided in the casing l5 so thatthe casing. l5 and pin 8 are free for limited movement with respect to each other in a vertical direction. A spring l8 encircles the portion ll of the pin 8 and is disposed between the shoulder lilof-the pin 8 and the top of the casing l5, urging the casing IE to a normal position with the pin 16 in engagement i .with the top of the slot l'l as shown in the drawing. I

The casing l5 is provided with a central bore l9 which receives, a primary pressing member 20 which is free for limited vertical movement therewithin, being restricted against free movement by a pin 2| secured thereto and operating within a slot 22 provided in the body of the casing-- 15. The primary pressing member 20 is normally urged to a position exterior of the edge of the casing by a spring 23 which is-disposed within the bore l 9 and is heldlmder compression between the body of the casing l5 at the bottom 24 of the bore l9 and against the inner surface of the primary pressing member 20. It willbe noted that the primary pressing member is provided with a convex outer face 25 of substantially the same contour as the inner surface'of the screw thread formations. cation is imparted to the arm 9 in a vertical direction.causing the supporting pin 8 and its associated mechanism to move-downwardly until the face 25 of the primarypressing member 20 engages the liner 1. As downward .motion continues,'the liner 1 is deformed from its planar form and is forced into engagement with the head of the closure, beingurged into such position by the face 25 of the primary pressing member. As

In many instances the liner will be disposed away from the head being engaged with Motion of recipromary pressing member 20 until such time as the pin 2| engages the lower surface of the slot 22 in the casing l5, and thereafter the arm 9, the

' supporting pin 8 and the associated mechanism movesunitarily, withdrawing the inserting member from the closure so that the same may be moved from the lining station and a new unlined closure presented thereto.

It will be clear from the foregoing description that by mydevice the liner is first positioned with its central portion in engagement with the head of the closure and this portion is placed under deforming pressure while permitting free and unrestricted deformation of the edge portion to permit proper and complete conformation of the center portion of the liner with the head of the closure. After such engagement, the liner, about its edge adjacent the periphery, is forced into engagement with the head portion, moving the liner out of engagement with the screw threads if it be lodged there. The liner is heldunder compression at its central portion during such operation and the edge portion is momentarily heldin deformed position and engagement with the head surface until the auxiliary pressing surface is withdrawn.

While I have illustrated and described certain preferred embodiments of my, invention, it. will be understood that the invention is not so limited but may be otherwise embodied within tho scope of the followingclaims.

I claim:

1. In a device for. lining a screw threaded; closure having a concave inner head surface with in liner disk of a diameter greater than the inner diameter of the closure at the threads. a primary downward movement progresses, the member 20 is caused to move relative to the casing II, the

pin 2| moving in the slot 22 and thus the pres,- sure' of spring 23 is transmitted through the primary pressing element 20 to the liner I holding 'the same in firm engagement with the head of the closure during continued downward movement of the arm I. As this'movement'continucs, the auxiliary pressing surface 26 of the casing fl is brought into engagement with the edge of the liner I thus causing the same to be properly deformed to assume the contour of the inner surface of the head of the closure by movement of portion of such liner disk into'conformity-with I pressing member of a diameter less than the diameter of the liner diskv to be positioned, a con-,

vex pressing surface .on said primary member engageable with the central portion only of a liner disk to be positioned to press the central the concave inner head surface of the closure and permit free and unrestricted deformation of such the casing l5 downwardly with respect to the V member 20.

Force is transmitted to the casing I 8 through the spring It, and after engagement of the auxiliary pressing surface 28 of the casing II with the liner I, continued downward movement of the arm 9 results in slidable movement of the pro jecting portion H of the supporting pin 8 within the bore of the casing II, pin I. being moved away from the top of the slot l'l upon such relative movement. This continues until the arm 9 reaches its lowermost position. The supporting pin 8 is adiustablysecured to thB SlIDDOIt 0 so that movemento'f the projecting portion 'H of the pin 8-is arrested prior to'e'ngagement of the pin l I with the extreme end of the slot I] so that the forceapplied to the casing I5 is always yieldingly cushioned by the spring I. Upon movement of reciprocation of the arm 9 upwardly, the auxiliary pressing surface 28 remains in' engagement with the edge of the liner '1 until the pinit liner disk at its edge, a secondary pressing member carrying said primary pressing member and having an annular pressing surface disposed about the pressing surface of said primary member and engageable .with the surface of said liner disk along a line disposed adjacent its edge to press such edge into conformity with the closure head, means yieldingly urging'said primary member to a position with its pressing surface exterior of the pressing surface of said secondary member, means for simultaneously moving said pressing members into position within a closure to,be lined 'to thereby bring saidprimary pressing'sur'fa'ce' into engagement with the liner disk prio'i ft'opressing of the edge portion thereof by the pr'essing surface of the secondary pressing member,

and yielding means disposed between said moving means and said secondary pressing member to limit the pressure applied thereby.

2. A device in accordance with olairn 1 in which the pressing members =are carried by a support adjustably secured to the means for simultane-.

ously moving the same into position.

3. A device in accordance with claim 1 in which 2 the secondary pressing member is hollow and the primary pressing member is .slidable axially thereinand in which a spring is provided in the secondary pressing member to move theprimary,

engages the casing II at the top of the slot ll whereupon continued upward movement causes the casing II to move with respect to the pripressing member to the position recited inclaim 1.

. HARRY E. GERLITZKI.

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