US4775874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic closing and conveying mechanism for non-mechanical printer or copier devices
Assignee: Canon Production Printing Germany GmbH and Co KG
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Filing: 1987-05-06
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Granted: 1988-10-04
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Expires: 2007-05-06
Abstract
Abstract A magnetic mechanism is provided for a non-mechanical printer or copier device comprising a conveying channel through which a developer mix including magnetic components contained therein flows, so that a plug of developer mix is generated via the magnetic mechanism for closing the conveying channel. The conveying channel contains a rotatable drum containing a magnetic strip and the drum is arranged in the conveying channel such that the one wall of the conveying channel forms a narrow retaining gap together with the drum and the other wall of the conveying channel forms a significantly broader conveying gap together with the drum.
Inventors
- 👤 Mehmet A. Buyukguclu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:05
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/0822; G03G15/0844
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
96 words
A magnetic mechanism comprising a rotatable drum containing a magnetic ledge, this drum being arranged in a conveying channel formed between two opposed walls through which developer mix with magnetic components therein flows, in a non-mechanical printer or copier device such that one of said walls of the conveying channel forms a narrow retaining gap together with said drum and the other of said walls of said conveying channel forms a significantly broader conveying gap together with said drum, wherein a plug of developer mix is generated via the magnetic mechanism for closing the conveying channel.
Claim 2
Dependent Claim
96 words
A magnetic mechanism comprising a rotatable drum containing a magnetic ledge, this drum being arranged in a conveying channel formed between two opposed walls through which developer mix with magnetic components therein flows, in a non-mechanical printer or copier device such that one of said walls of the conveying channel forms a narrow retaining gap together with said drum and the other of said walls of said conveying channel forms a significantly broader conveying gap together with said drum, wherein a plug of developer mix is generated via the magnetic mechanism for closing the conveying channel.
Claim 3
Dependent Claim
38 words
A magnetic mechanism according to claim 1, wherein an entry region is formed at said retaining gap where said drum rotates into said gap and a stripper ledge is arranged at the entry region of the retaining gap.
Claim 4
Dependent Claim
32 words
A magnetic mechanism according to claim 1, wherein the magnetic mechanism for removing the developer mix is arranged at the floor of a developing station of a non-mechanical printer or copying device.
Claim 5
Dependent Claim
19 words
A magnetic mechanism according to claim 1, wherein the magnetic ledge is composed of a plurality of individual magnets.
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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) | 1991-10-04 | 1992-04-04 | 1992-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-04 | 1996-04-04 | 1996-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-04 | 2000-04-04 | 2000-10-04 | $7700.00 | Window Closed / Lapsed |