US3821047A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of solvent sealing plastic film cassette seams
Assignee: Agfa Gevaert AG
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Filing: 1972-08-16
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Granted: 1974-06-28
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Expires: 1992-08-16
Abstract
Abstract A synthetic plastics film cassette which consists of a cassette body covered by a U-shaped cassette cover is closed by spraying a solvent between the cover and body of the cassette. The spraying arrangement consists of several measuring cylinders and pistons, with which certain positions on the cassettes are sprayed with solvents through thin tubes.
Inventors
- 👤 H Schruff
- 👤 H Lehmann
- 👤 J Siefen
- 👤 G Weib
- 👤 H Mathner
- 👤 W Adams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:34
CPC Classifications
B; B29; B29C; B29C66/00; B29C66/50; B29C66/51; B29C66/54; B29C65/00; B29C65/48; B29C65/4895; B29C65/52; B29C65/522; B29C65/54; B29C65/78; B29C65/7858; B29C65/7879; B29C65/7882; B29C65/80; B29C66/545; B29C66/80; B29C66/87; B29C66/874; B29C66/8746; B65; B65B; B65B51/00; B65B51/02; B65B51/023; B65B7/00; B65B7/16; G; G03; G03C; G03C3/00; B29C65/544; Y; Y10; Y10T; Y10T156/00; Y10T156/17; Y10T156/1788; Y10T156/179; Y10T156/1798
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
62 words
A method of sealing the seams of a film cassette having a synthetic plastic body and cover comprising the steps of spraying measured amounts of a solvent for said synthetic plastic upwardly relative to said synthetic plastic body into predetermined portions of said seams whereby said solvent runs along said seams and seals them and is prevented from running inside the cassette.
Claim 2
Independent Claim
62 words
A method of sealing the seams of a film cassette having a synthetic plastic body and cover comprising the steps of spraying measured amounts of a solvent for said synthetic plastic upwardly relative to said synthetic plastic body into predetermined portions of said seams whereby said solvent runs along said seams and seals them and is prevented from running inside the cassette.
Claim 3
Dependent Claim
49 words
A method as set forth in claim 1 wherein said measured amounts of solvent are sprayed at a predetermined station of the cassettes and said cassettes are successively conveyed to said stations to spray said measured amounts of solvent into said predetermined portions of said seams at said stations.
Claim 4
Dependent Claim
25 words
A method as set forth in claim 2 wherein said cassettes are clamped firmly in position while their seams are being sprayed at said stations.
Claim 5
Dependent Claim
18 words
A method as set forth in claim 2 wherein said spraying at said stations is performed substantially simultaneously.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |