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US 4,003,492 AGranted
Container body side seam construction
AssigneeMetal Box Limited
InventorsJohn Beveridge, Thomas Roderick Harries Davies, Fred Fidler, Maurice Frank Ring
Life of this patent
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AssigneeMetal Box Limited
InventorsJohn Beveridge, Thomas Roderick Harries Davies, Fred Fidler, Maurice Frank Ring
Estimating the term…
This disclosure relates to a container body side seam construction wherein a metal body blank is provided with adhesive strips along opposite edges thereof, followed by the forming of hooks at such opposite edges. Thereafter, the body blank is formed in a conventional body-making machine so as to first interlock the hooks and then, while the hooks are engaged, flattening the hooks to form an interlocked side seam wherein the adhesive strips are in tightly clamped relation with respect to one another and portions of the side seam. While the adhesive strips are so held, the side seam is heated so as to effect bonding of the adhesive strips. The principal advantage of the container body side seam construction is that no external means is required to hold the side seam portions in their proper positions while the adhesive strips are being heated and then permitted to set.
A container body side seam comprising a body wall having interlocking hook portions facing in opposite directions, a single strip of adhesive bonded to each of said hook portions, and said two adhesive strips having portions of material width in overlapping relation and being bonded together along an interface extending parallel to adjacent hook portions, said body wall having opposite sides, and all of said adhesive strips being secured to a single one of said body wall sides before said hooks are placed in interlocking relationship, one of said two adhesive strips extending beyond a point of juncture between said two adhesive strips and being bonded directly to both of said hook portions.
A container body side seam comprising a body wall having interlocking hook portions facing in opposite directions, a single strip of adhesive bonded to each of said hook portions, and said two adhesive strips having portions of material width in overlapping relation and being bonded together along an interface extending parallel to adjacent hook portions, said side seam including inner and outer entrance slots, and said bonded together adhesive strips having a portion thereof at and sealing one of said entrance slots, said body wall having opposite sides, and all of said adhesive strips being secured to a single one of said body wall sides.
A body blank for a tubular container body which comprises sheet material having opposite edges and opposite sides, oppositely facing and inter-engageable hook portions formed along said opposite edges thereof, and adhesive strips attached to said sheet material along the said opposite edges thereof, all of said adhesive strips being on a single one only of said material sides for bonding together to form a seal between said hook portions when inter-engaged to form a container body.
Dependencies are inferred from the claim text.