US3196757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making a draw string bag
Assignee: Colodense Ltd
•
Filing: 1963-07-29
•
Granted: 1965-07-27
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Expires: 1983-07-29
Abstract
No abstract record available.
Inventors
- 👤 Samways Bruce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:19
CPC Classifications
B; B65; B65D; B65D33/00; B65D33/16; B65D33/28; B31; B31B; B31B70/00; B31B70/74; B31B70/81; B31B70/813; B31B70/8134; B31B70/8135; B31B70/8137
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
A CONTINUOUS METHOD FOR THE MANUFACTURE OF DRAW STRING BAGS COMPRISING ADVANCING A CONTINOUS WEB OF A HEAT SEALABLE FLEXIBLE SHEET MATERIAL, FORMING A HEM AT EACH BAG MOUTH FORMING MARGIN OF THE WEB WITH SELECTED PORTIONS DEFINED BY LINES OF WEAKNESS FORMED IN THE HEMS AT BAG WIDTH INTERVALS TO FORM DETACHABLE PULLING TAGS IN THE COMPLETED BAGS, INSERTING DRAW STRINGS IN THE HEMS AT THE SAME SPEED AS THE SPEED OF TRAVEL OF THE WEB, SEALING THE OPEN EDGES OF THE HEMS TO THE BODY OF THE WEB TO FORM TUBULAR CHANNELS ENCLOSING THE DRAW STRINGS AND, WITH THE HEMS AT THE BAG MOUTH FORMING MARGINS LYING IN JUXTAPOSITION, SEALING AND SEVERING THE WEB TRANSVERSELY AT BAG WIDTH INTERVALS COINCIDENT WITH AN EDGE OF EACH SELECTED PORTION SO ASS TO SEAL PORTIONS OF THE DRAW STRINGS INTERSECTED BY THE SEALS WITHIN THE TUBULAR CHANNELS AND TO SEPARATE INDIVIDUAL BAGS WITH SEALED SIDE MARGINS FROM THE WEB.
Claim 2
Dependent Claim
158 words
A CONTINUOUS METHOD FOR THE MANUFACTURE OF DRAW STRING BAGS COMPRISING ADVANCING A CONTINOUS WEB OF A HEAT SEALABLE FLEXIBLE SHEET MATERIAL, FORMING A HEM AT EACH BAG MOUTH FORMING MARGIN OF THE WEB WITH SELECTED PORTIONS DEFINED BY LINES OF WEAKNESS FORMED IN THE HEMS AT BAG WIDTH INTERVALS TO FORM DETACHABLE PULLING TAGS IN THE COMPLETED BAGS, INSERTING DRAW STRINGS IN THE HEMS AT THE SAME SPEED AS THE SPEED OF TRAVEL OF THE WEB, SEALING THE OPEN EDGES OF THE HEMS TO THE BODY OF THE WEB TO FORM TUBULAR CHANNELS ENCLOSING THE DRAW STRINGS AND, WITH THE HEMS AT THE BAG MOUTH FORMING MARGINS LYING IN JUXTAPOSITION, SEALING AND SEVERING THE WEB TRANSVERSELY AT BAG WIDTH INTERVALS COINCIDENT WITH AN EDGE OF EACH SELECTED PORTION SO ASS TO SEAL PORTIONS OF THE DRAW STRINGS INTERSECTED BY THE SEALS WITHIN THE TUBULAR CHANNELS AND TO SEPARATE INDIVIDUAL BAGS WITH SEALED SIDE MARGINS FROM THE WEB.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-07-26 | 1969-01-25 | 1969-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-26 | 1973-01-25 | 1973-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-26 | 1977-01-25 | 1977-07-27 | $7700.00 | Window Closed / Lapsed |