Back to results
US 4,733,780 AGranted
Block-sealed flexible saddle bags
OwnerHarold A. Jenseninventor
Life of this patent
Estimating the term…
Abstract
A block of paired, side-gussetted, bottom-weld bags. Each bag has an opening on one side to facilitate the removal of individual bags from the block.
Claims10
Paired flexible bags which comprise:
- a first seamless side-gussetted bag joined to a second seamless side-gussetted bag at their upper edges along a common release line, each bag having an outer wall and a facing wall;
- a common aperture formed only in the outer walls, the aperture intersected by the release line;
- a suspension portion integrally formed at the release line, the suspension portion characterized by a hole formed in said facing walls and the bags being releasably secured to said suspension portion.
A method for forming flexible bags which includes:
- introducing a film in flat configuration between two vacuum plates spaced apart from one another;
- inflating the film to billow the same by introducing an airstream into the film downstream of said plates such that the one ply of the film contacts the other vacuum plate, the other vacuum plate having a die;
- the other ply drawn into engagement with the die, said other ply cut substantially simultaneously upon contacting the die thereby forming an opening;
- deflating the film whereby it resumes its flat configuration;
- cutting the film from one side to the other;
- sealing the cut film at either end thereof to form seal lines;
- forming a perforated line intermedate the sealed ends and intersecting the opening;
- and
- forming a suspension portion in the bags integraly with the peforated line whereby the bags may be removed from the suspension portion.
6 more elements
Dependencies are inferred from the claim text.