John T Hummel

US Patent:

45265658, Jul 2, 1985

Filed:

Feb 23, 1983

Appl. No.:

6/469028

Inventors:

John E. Hummel - Tulsa OK
William E. Baab - Tulsa OK

Assignee:

Linear Films, Inc. - Tulsa OK

International Classification:

B31B 3500

US Classification:

493196

Abstract:

A flat bottom plastic film bag includes triangular gusset portions formed by a plurality of parallel heat welds which fuse portions of opposed pleats together and cooperate with a transverse central bottom seam to form a flat bottom bag from a seamed or seamless plastic film tube. The longitudinal side and end walls of the bag are provided with heat embossed corrugations which enhance the freestanding characteristics of the bag and a transverse crease is formed along the fold line between the sidewalls of the bag and the bottom wall to enhance the bottom forming characteristics of the bag when it is snapped from a folded position to an opened position. The bag may be made by an improved process wherein a blown film tube is continuously slit sealed into a plurality of tubes which are reinflated, then collapsed to form opposed double pleat folds, followed by corrugation of the side and end walls of the tube, formation of the transverse crease defining the fold line between the bottom and sidewalls and, finally, formation of the gusset welds, the transverse bottom seal and perforation or cutoff to form the individual bags.

US Patent:

46001638, Jul 15, 1986

Filed:

Dec 10, 1982

Appl. No.:

6/448614

Inventors:

John E. Hummel - Tulsa OK
William E. Baab - Tulsa OK

Assignee:

Linear Films, Inc. - Tulsa OK

International Classification:

B65H 2306
B25B 3300

US Classification:

242 96

Abstract:

A hand grip member for insertion in the end of a tubular core for flexible rolled material such as plastic stretch film includes opposed handle portions projecting from one side of a support web which includes cylindrical bearing shoe segments projecting from the other side of the support web. The handle portions are spaced apart and may be squeezed to move toward each other thereby deflecting the web to cause the bearing shoes to expand radially into gripping engagement with the inner wall of the roll core to selectively control the drag on the roll as the material is unrolled in the stretch wrapping process. The hand grip members are preferably used in pairs and are preferably molded in one piece of a suitable elastic material such as nylon.