US2357581A - Closure liner - Google Patents

Description

J, P. CU RRAN Sept. 5, 1944.

CLOSURE LINER Filed March 25, 1942 M Mr T r mu vC P e m w J ATTORN S Patented Sept. 5, 1944 CLOSURE LINE-R Jerome P. Curran, Toledo, Ohio, assignor to Owens-Illinois Glass Company, a corporation of Ohio Application March 25, 1942, Serial No. 436,143

' 1 Claim. (01. 288- 33) The present invention relates to improvements in closures and liners therefor and is particularly concerned with the provision of a satisfactory substitute for cork and like conventional liner materials which are usually employed in sealing beverage bottles.

An object of my invention is the provision of a liner formed from liquid-proofed pulpboard, cot' ton, or similar material and so fabricated that it may be sufficiently and readily compressed during application to a container to insure effective sealing thereof.

Another object is the provision of a liquidproofed pulpboard liner for bottle and jar closures Which is formed with a multiplicity of openings so arranged as to facilitate compression of the liner when applied to a container.

Other objects will be in part apparent and in part pointed outhereinafter.

In the drawing:

Fig. 1 is a plan view showing a liner embodying my invention assembled with a crown type of closure.

Fig. 2 is a sectional view taken along the line 22 of Fig. 1.

Fig. 3 is a sectional view taken along the line 3-3 of Fig. 2.

Fig. 4 is a sectional view showing the relation between a liner embodying my invention and 'a conventional cap and bottle neck.

Fig. 5 is a plan view of a liner embodying a. series of diamond shape apertures positioned to overlie the sealing surface or finish of a bottle.

Fig. 6 is a sectional view taken along the line 6--6 of Fig. 5.

Fig. 7 is a plan view showing another arrangement of slits in the liner,

Fig. 8 is a sectional view taken along the line 88 of Fig. 7.

Fig. 9 is a plan view of still a further arrangement of slits in a liner.

Fig. 10 is a sectional view taken along the line Ill-l0 of Fig. 9. p

In all of the illustrated embodiments of my invention, the liner is formed of .pulpboard, cotton, or some similar material which is suitably liquid-proofed in any conventional or preferred manner. The material employed has little, if any, resilience and normally in liner formation is not readily nor sufficiently compressible to function as a substitute for cork, etc. Slits, slots or other openings, extending through the entire thickness of the liner and properly located, facilitate and permit compression of the pulp-board sealing surfaces.

tial compression (which is high due to the per-- etc., in the vicinity of the bottle finish'and the consequent creation of a perfect seal.

In Figs. 1 to 4 the line embodying my invention is assembled with a crown type metal closure [5 which is attachable to the beaded, or lipped neck I5, of a bottle (not shown). Other well known types of closures may well be used. In every I instance the liner is provided with slots, or openings in that area which will directly contact the sealing surface IT, or finish of the container so that top pressure applied to the crown cap, or closure during the sealing'operation may operate to compress the liner immediately over the sealing surface and force it into intimate sealing contact with said surface.

In Figs. 1 to 4 the liner I8 is of disk formation, constructed of liquid-proofed pulpboard, cotton or similar material and provided in the sealing area IS with annular series of circumferentially extending slots 20. The slots of the two series are staggered as shown. As a result of providing these slots in the sealing area (that area which directly engages the sealing surface of the bottle), the liner in this particular zone will compress incident to the application of top pressure to the closure during the capping operation more readily and to a greater degree than a solid imperforate sheet. Vertical compression of a sufficient degree is possible only due to the presence of the vertical slots which allow horizontal expansion, or flow of portions of the pulpboard between and immediately adjacent the perforations, when top pressure is applied thereto.

After the liner has been compressed and the closure skirt crimped over the lip of the container, the top pressure is released. The liner then tends to expand slightly and consequently insures effective sealing contact between the The greater the degree of iniforations) the better the seal, as is obvious.

In Figs. 5 and 6 relatively large apertures 2| substantially diamond shape, are substituted for the slots 20. These apertures are arranged in an annular series in the sealing area and function to facilitate high compression of this part of the liner and creation of intimate firm contact between the liner and container.

In Figs. '7 and 8 radial and circumferential slots 22 and 23 respectively are arranged in alternation in an annular path. Here-again the slots function as do those shown in Figs. 1 to 4.

The two concentric annular series of radial staggered slots 24, shown in Figs. 9 and 10, also function (as do the openings in Fig. 5) to facilidisk including a sealing area, said disk having an annular series of individual closely spaced openings in the sealing area, whereby portions of the pulpboard may flow into said openings incident to the application of top pressure to the disk and thereby facilitate compression of the liner.

JEROME P. CURRAN.

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