US3619972A
Expired / Lapsed
US
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Packaging apparatus
Assignee: Hayssen Manufacturing Co
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Filing: 1969-12-05
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Granted: 1971-11-16
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Expires: 1989-12-05
Abstract
Abstract A MACHINE FOR APPLYING FILM COVERS TO PREFORMED TRAYS IN WHICH FILLED TRAYS ARE CONVEYED BY A CONVEYOR CONTINUOSLY THROUGH A SEALING ZONE, A WEB OF FILM IS FED FROM A ROLL THEREOF TO OVERLIE THE TRAYS AS THEY TRAVEL THROUGH THE SEALING ZONE, AND THE FILM IS SEALED TO THE TRAYS BY A PLATEN WHICH MOVES DOWNWARD TO PRESS THE FILM AGAINST THE RIM OF A TRAY, THEN LINEARLY FORWARD IN UNSION WITH THE CONVEYOR CONTAINING TO PRESS THE FILM AGAINST THE RIM FOR A SEALING INTERVAL, THEN UPWARD AND THEN BACK TO REPEAT THE CYCLE, THE FILM BEING CUT BETWEEN SUCESSIVE TRAYS.
Inventors
- 👤 Frank E Pringle
- 👤 David A Wilson
- 👤 Richard H Cochrane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:06
CPC Classifications
B; B65; B65B; B65B7/00; B65B7/16; B65B7/162; B65B7/164; B29; B29C; B29C65/00; B29C65/02; B29C65/18; B29C65/24; B29C65/30; B29C65/305; B29C65/74; B29C65/745; B29C65/7451; B29C65/78; B29C65/7858; B29C65/7861; B29C65/7867; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/13; B29C66/131; B29C66/20; B29C66/24; B29C66/242; B29C66/2424; B29C66/24243; B29C66/24244; B29C66/50; B29C66/51; B29C66/53; B29C66/534; B29C66/5346; B29C66/53461; B29C66/80; B29C66/81; B29C66/814; B29C66/8145; B29C66/81457; B29C66/816; B29C66/8161; B29C66/8167; B29C66/82; B29C66/822; B29C66/8226; B29C66/83; B29C66/834; B29C66/8351; B29C66/83541; B29C66/84; B29C66/849; B29C66/90; B29C66/91; B29C66/912; B29C66/9121; B29C66/91231; B29C66/914; B29C66/9141; B29C66/91421
Claims Analysis
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References Cited (Backward Citations)
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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) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |