Patch top closure member including a monoaxially oriented film layer
AssigneeBoise Cascade Corporation
InventorThomas C. Elias
Life of this patent
Estimating the term…
Abstract
A partial opening patch top closure member for containers is disclosed including at least one layer of monoaxially oriented synthetic plastic film the grain pattern of which extends in a given direction. The closure member includes body and tab portions so arranged relative to the grain pattern of the film that upon pulling of the tab portion, a section of the body portion is torn from the body portion along a line of tear parallel with the grain pattern, thereby leaving bonded to the container a residual body portion section containing a dispensing opening. Preferably the line of tear is at least partially defined by a tear-initiating cut contained in a juncture between the tab and body portions.
Claims5
A composite container of the patch top closure type, comprising
- (a) a vertically arranged tubular cylindrical body member including, in concentrically arranged layers,
- (1) an impervious inner liner layer;
- (2) at least one fibrous body wall layer;
- and
- (3) an outer label layer;
- (4) the upper end of said container body member being reversely curled outwardly, whereby said inner liner layer extends around the curled upper extremity of said body member;
- and
- (b) a flexible patch top member closing the reversely curled upper end of said body member, said patch top member including a generally circular disk-shaped body portion extending across the reversely curled upper end of said body member, and a pull tab portion extending radially outwardly from said body portion, said patch top member being of laminated construction including, in bonded layers,
- (1) an upper layer of metal foil;
- (2) a central layer of monoaxially oriented synthetic plastic film the grain pattern of which extends in a direction parallel with the longitudinal axis of said pull tab portion;
- and
- (3) a lower layer of adhesive material bonding said patch top member to said reversely curled body member upper end;
- (4) said patch top member containing in at least one juncture between said tab and body portions a tear-initiating cut, said pull tab portion being operable to tear a removable section from said body portion along a line of tear initiating at said cut and extending parallel with said given direction, whereby a residual section of said body portion containing a dispensing opening remains bonded to said container end.
Dependencies are inferred from the claim text.