Plastic bag-making machine
Abstract
Abstract An improved bag making machine is disclosed having a rotatable bag stock feed drum and employing a pressure heat seal means operatively associated with a plate mandrel about which the bag stock is formed. The plate mandrel includes an air conduit having an inlet port adapted to be intermittently connected to a supply of pressurized air in times relation with the rotation of the feed drum. The air conduit further has an outlet port and the air intermittently discharging therefrom urges the bag stock away from the plate mandrel preventing the bag stock from sticking to the mandrel. The machine also includes roller compensator means between the feed drum and the plate mandrel to adjust the relative positions of transverse and longitudinal pressure heat seals.
Inventors
- 👤 S Schuster
Bibliographic Details
Claims Analysis
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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) | 1977-09-23 | 1978-03-25 | 1978-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-23 | 1982-03-25 | 1982-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-23 | 1986-03-25 | 1986-09-24 | $7700.00 | Window Closed / Lapsed |