1
Ewald A Kamp: Closure fastening device. Union Carbide Corporation, David Fink, July 15, 1980: US04212337 (82 worldwide citation)

A closure fastening device comprises a first channel element including hook portions facing away from each other and a second channel element including hook portions facing towards each other, whereby the channel elements interlock by pressing the first channel element into the second channel elemen ...


2
Ewald A Kamp: Film-tape-closure device slot cast integrated interlocking structure and extrusion method. Union Carbide Corporation, Real J Grandmaison, John C LeFever, January 31, 1984: US04428788 (61 worldwide citation)

A method and apparatus for extruding a film, a tape and a closure device simultaneously to produce integrated interlocking closure stock comprising (a) extruding a sheet of film onto a rotating casting roll at a rate to provide a high draw-down ratio; (b) extruding a tape to join the film on the cas ...


3
Kenneth E Cisek, Ewald A Kamp: Closure. Union Carbide Corporation, James L Sonntag, October 23, 1984: US04477950 (54 worldwide citation)

Disclosed is a closure having an aperture at one end and projections on its edges that is improved by the use of slits, either extending from the aperture or extending from the abutment edges of the projections, which provide a locking action that prevents release of the closure when under elongatio ...


4
Michael G Borchardt, Robert T Dorsey, Ewald A Kamp: Trident interlocking closure profile configuration. First Brands Corporation, Gary L Wamer, October 18, 1988: US04778282 (53 worldwide citation)

An interlocking closure fastening device comprising an omega-shaped closure element and a co-acting closure element having a trident profile configuration. The co-acting closure element has a profile portion comprising three generally parallel arm portions. The first arm portion terminates in a hook ...


5
Ewald A Kamp: Method and extruding die apparatus for producing a plastic closure strip. Union Carbide Corporation, John C Lefever, Real J Grandmaison, September 10, 1985: US04540537 (51 worldwide citation)

An extrusion die apparatus for producing at least one plastic closure strip having profile and base portions, includes a die body having a die face, a profile channel defined in the die body and communicating with a profile die opening in the die face for extruding a profile portion, and a base chan ...


6
Ewald A Kamp: Multiposition interlocking closure fastening device. First Brands Corporation, Gary L Wamer, October 15, 1991: US05056933 (44 worldwide citation)

An interlocking closure fastening device comprising a first closure element and a second closure element wherein the first closure element or the second closure element may comprise a plurality of closure element units having the same or alternately different structures. The closure fastening device ...


7
Ewald A Kamp: Interlocking closure bag for use in high temperature environment. Union Carbide Corporation, John C LeFever, Real J Grandmaison, December 24, 1985: US04561108 (41 worldwide citation)

A flexible container for storing foods in a freezer and cooking foods therein. The container includes an interlocking closure fastening device comprising an omega-shaped closure element and a co-acting clamping closure element. The co-acting clamping closure element may have a profile portion compri ...


8
Michael G Borchardt, Robert T Dorsey, Ewald A Kamp: Trident interlocking closure profile configuration. First Brands Corporation, Gary L Wamer, December 1, 1987: US04710968 (31 worldwide citation)

An interlocking closure fastening device comprising an omega-shaped closure element and a co-acting closure element having a trident profile configuration. The co-acting closure element has a profile portion comprising three generally parallel arm portions. The first arm portion terminates in a hook ...


9
Ewald A Kamp: Multiple omega closures. First Brands Corporation, Gary L Wamer, May 12, 1987: US04665557 (31 worldwide citation)

An interlocking closure fastening device comprising a first closure element having an omega-shaped profile portion, and a second complementary closure element having a plurality of omega-shaped profile portions spaced to interdigitate with the first closure element and occlude with the first closure ...


10
Ewald A Kamp: Multiposition interlocking closure fastening device. First Brands Corporation, Gary L Wamer, August 8, 1989: US04854017 (25 worldwide citation)

An interlocking closure fastening device comprising a first closure element and a second closure element wherein the first closure element or the second closure element may comprise a plurality of closure element units having the same or alternately different structures. The closure fastening device ...