US4500307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for producing continuous bags of thin wall material
Assignee: Individual
•
Filing: 1981-10-23
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Granted: 1985-02-19
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Expires: 2001-10-23
Abstract
Abstract An apparatus and method for production of continuous bags of thin material with each of the bags having an opening on the side is disclosed.
Inventors
- 👤 Danial N. P. Bridgeman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:12
CPC Classifications
B; B31; B31B; B31B70/00; B31B70/14; B31B70/16; B31B2155/00; B31B2155/003; B31B2160/00; B31B2160/10; B31B70/74; B31B70/92; B31B70/94; B31B70/946
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
112 words
An apparatus for the production of continuous bags of thin material with each of said bags having an opening on a side, wherein said apparatus having reel means for supplying a continuous length of advancing thin tubing advancing in the direction of production, said tubing having a width substantially perpendicular to said direction of production, sealing means for sealing said tubing in a plurality of first spaced locations, wherein said improvement comprising: a single blade having a length at least the width of said tubing; said blade adapted to cut through substantially one half the width of said tubing, and to perforate through the other half of the width of said tubing.
Claim 2
Independent Claim
112 words
An apparatus for the production of continuous bags of thin material with each of said bags having an opening on a side, wherein said apparatus having reel means for supplying a continuous length of advancing thin tubing advancing in the direction of production, said tubing having a width substantially perpendicular to said direction of production, sealing means for sealing said tubing in a plurality of first spaced locations, wherein said improvement comprising: a single blade having a length at least the width of said tubing; said blade adapted to cut through substantially one half the width of said tubing, and to perforate through the other half of the width of said tubing.
Claim 3
Dependent Claim
32 words
The apparatus of claim 1 further comprising first means for twisting said tubing substantially ninety degrees prior to perforation; and second means for twisting said tubing substantially ninety degrees after said cutting.
Claim 4
Independent Claim
102 words
An apparatus for the production of continuous bags of thin material with each of said bags having an opening on a side, wherein said apparatus comprises: reel means for supplying a continuous length of advancing thin tubing; sealing means for sealing said tubing in a plurality of first spaced locations; anvil means to one side of said tubing; a single blade means having a plurality of spaced apart teeth and a plurality of cutting blades between each adjacent teeth; and said blade means positioned on other side of said tubing and adapted to move to said anvil means, with said tubing therebetween.
Claim 5
Independent Claim
102 words
An apparatus for the production of continuous bags of thin material with each of said bags having an opening on a side, wherein said apparatus comprises: reel means for supplying a continuous length of advancing thin tubing; sealing means for sealing said tubing in a plurality of first spaced locations; anvil means to one side of said tubing; a single blade means having a plurality of spaced apart teeth and a plurality of cutting blades between each adjacent teeth; and said blade means positioned on other side of said tubing and adapted to move to said anvil means, with said tubing therebetween.
Claim 6
Dependent Claim
26 words
The apparatus of claim 3 wherein said blade means further comprising anvil stop means to limit the movement of said blade means to said anvil means.
Claim 7
Dependent Claim
43 words
The apparatus of claim 4 wherein each of said teeth and each of said cutting blades protrudes from said blade means and each of said teeth having a height of protuberance from said blade means greater than that of its adjacent cutting blade.
Claim 8
Dependent Claim
31 words
The apparatus of claim 5 wherein the difference in the heights of protuberance of a tooth and its adjacent cutting blade is substantially the thickness of the walls of said tubing.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-02-19 | 1988-08-20 | 1989-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-19 | 1992-08-20 | 1993-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-19 | 1996-08-20 | 1997-02-19 | $7700.00 | Window Closed / Lapsed |