US3942694A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bag severing machine
Assignee: NATIONAL TRUST Co A TRUST Co OF ONTARIO
•
Filing: 1974-10-04
•
Granted: 1976-03-09
•
Expires: 1994-10-04
Abstract
Abstract A machine for severing individual plastic bags from a length of bags joined by perforated junctures. The length of bags is extended and severed by the action of two spaced apart sets of rollers, each set grasping the bags, the second set rotating with a higher surface speed than the first. During extension and severing the bags are supported by two overlapping conveyor belts travelling at speeds intermediate the surface speed of the two sets of rollers. The conveyor belts minimize the whipping of the severed edges of the bags. The bag severing machine is suited to operate in conjunction with equipment for folding plastic bags and inserting the folded bags in packages.
Inventors
- 👤 Elwyn David Jones
- 👤 Derek Edgar Scuffell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:34
CPC Classifications
B; B26; B26F; B26F3/00; B26F3/002; B65; B65H; B65H29/00; B65H29/38; B65H29/46; B31; B31B; B31B70/00; B31B70/02; B31B70/10; Y; Y10; Y10T; Y10T225/00; Y10T225/30; Y10T225/35
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
227 words
A machine for severing individual bags from a continuously fed length of bags joined by perforated junctures which comprises first and second spaced apart sets of double coating rollers, the second set of rollers being positioned downstream from the first set of rollers, and positioned intermediate said first and second set of rollers a bag support means comprising a lower endless conveyor belt and in contact therewith a cooperating upper endless conveyor belt, said cooperating conveyor belts being adapted to support the length of bags between the contacting surfaces of the belts as the length of bags passes from between the first set of rollers to the second set of rollers, the second set of rollers being adapted to grasp the length of bags issuing from between the conveyor belts, and means for driving the two sets of rollers and intermediate conveyor belts so that the surface speed of the second set of rollers is greater than the speed of the conveyor belts and the speed of the conveyor belts is greater than the surface speed of the first set of rollers, thus extending the length of bags as it passes from the first set of rollers to the second set of rollers so as to sever the individual bags at the perforated junctures, the individual severed bags being delivered from between the second set of rollers.
Claim 2
Dependent Claim
227 words
A machine for severing individual bags from a continuously fed length of bags joined by perforated junctures which comprises first and second spaced apart sets of double coating rollers, the second set of rollers being positioned downstream from the first set of rollers, and positioned intermediate said first and second set of rollers a bag support means comprising a lower endless conveyor belt and in contact therewith a cooperating upper endless conveyor belt, said cooperating conveyor belts being adapted to support the length of bags between the contacting surfaces of the belts as the length of bags passes from between the first set of rollers to the second set of rollers, the second set of rollers being adapted to grasp the length of bags issuing from between the conveyor belts, and means for driving the two sets of rollers and intermediate conveyor belts so that the surface speed of the second set of rollers is greater than the speed of the conveyor belts and the speed of the conveyor belts is greater than the surface speed of the first set of rollers, thus extending the length of bags as it passes from the first set of rollers to the second set of rollers so as to sever the individual bags at the perforated junctures, the individual severed bags being delivered from between the second set of rollers.
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) | 1979-03-09 | 1979-09-08 | 1980-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-09 | 1983-09-08 | 1984-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-09 | 1987-09-08 | 1988-03-09 | $7700.00 | Window Closed / Lapsed |