US3900591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Developed image transfer
Assignee: 3M Co
•
Filing: 1973-06-08
•
Granted: 1975-08-19
•
Expires: 1993-06-08
Abstract
Abstract A method of transferring electrographic toner powder images to plain paper, wherein a transfer device includes an apertured, electrically conductive support member overlying which is a surface layer in the form of a pile fabric having a multiplicity of electrically conductive fibrous loops, and vacuum means cooperating with the apertures for drawing copy paper into intimate clinging engagement with the surface layer.
Inventors
- 👤 Robert J Kline
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:29
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/14; G03G15/16; G03G15/1665; G03G15/167; G03G15/1685
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
3 words
A PROCESS COMPRISING:
Claim 2
Dependent Claim
3 words
A PROCESS COMPRISING:
Claim 3
Dependent Claim
42 words
PROVIDING CONTACT BETWEEN A FIRST SURFACE OF A WEB AND A TRANSFER MEMBER, SAID TRANSFER MEMBER COMPRISING AN APERTURED, ELECTRICALLY CONDUCTIVE SUPPORT MEMBER AND A SURFACE LAYER IN THE FORM OF A PILE FABRIC HAVING A MULTIPLICITY OF ELECTRICALLY CONDUCTIVE FIBROUS LOOPS,
Claim 4
Dependent Claim
42 words
PROVIDING CONTACT BETWEEN A FIRST SURFACE OF A WEB AND A TRANSFER MEMBER, SAID TRANSFER MEMBER COMPRISING AN APERTURED, ELECTRICALLY CONDUCTIVE SUPPORT MEMBER AND A SURFACE LAYER IN THE FORM OF A PILE FABRIC HAVING A MULTIPLICITY OF ELECTRICALLY CONDUCTIVE FIBROUS LOOPS,
Claim 5
Dependent Claim
26 words
VACUUM DRAWINGS SAID FIRST SURFACE OF SAID WEB INTO INTIMATE CONTACT WITH SAID ELECTRICALLY CONDUCTIVE LOOPS WHEREBY SAID WEB IS STATIONARY RELATIVE TO SAID TRANSFER MEMBER,
Claim 6
Dependent Claim
26 words
VACUUM DRAWINGS SAID FIRST SURFACE OF SAID WEB INTO INTIMATE CONTACT WITH SAID ELECTRICALLY CONDUCTIVE LOOPS WHEREBY SAID WEB IS STATIONARY RELATIVE TO SAID TRANSFER MEMBER,
Claim 7
Dependent Claim
26 words
vacuum drawings said first surface of said web into intimate contact with said electrically conductive loops whereby said web is stationary relative to said transfer member,
Claim 8
Dependent Claim
26 words
vacuum drawings said first surface of said web into intimate contact with said electrically conductive loops whereby said web is stationary relative to said transfer member,
Claim 9
Dependent Claim
26 words
vacuum drawing said first surface of said web into intimate contact with said electrically conductive loops whereby said web is stationary relative to said transfer member,
Claim 10
Dependent Claim
26 words
vacuum drawing said first surface of said web into intimate contact with said electrically conductive loops whereby said web is stationary relative to said transfer member,
Claim 11
Dependent Claim
10 words
The process of claim 1 wherein said web is paper.
Claim 12
Dependent Claim
14 words
The process of claim 1 wherein said potential difference is at least 400 volts.
Claim 13
Dependent Claim
36 words
contacting a second surface of said web opposing said first surface of said web with a carrier surface bearing particles disposed in a predetermined pattern thereon, said particles having electrical charges of one polarity associated therewith,
Claim 14
Dependent Claim
36 words
contacting a second surface of said web opposing said first surface of said web with a carrier surface bearing particles disposed in a predetermined pattern thereon, said particles having electrical charges of one polarity associated therewith,
Claim 15
Dependent Claim
36 words
contacting a second surface of said web opposing said first surface of said web with a carrier surface bearing particles disposed in a predetermined pattern thereon, said particles having electrical charges of one polarity associated therewith,
Claim 16
Dependent Claim
36 words
contacting a second surface of said web opposing said first surface of said web with a carrier surface bearing particles disposed in a predetermined pattern thereon, said particles having electrical charges of one polarity associated therewith,
Claim 17
Dependent Claim
36 words
CONTACTING A SECOND SURFACE OF SAID WEB OPPOSING SAID FIRST SURFACE OF SAID WEB WITH A CARRIER SURFACE BEARING PARTICLES DISPOSED IN A PREDETERMINED PATTERN THEREON, SAID PARTICLES HAVING ELECTRICAL CHARGES OF ONE POLARITY ASSOCIATED THEREWITH,
Claim 18
Dependent Claim
36 words
CONTACTING A SECOND SURFACE OF SAID WEB OPPOSING SAID FIRST SURFACE OF SAID WEB WITH A CARRIER SURFACE BEARING PARTICLES DISPOSED IN A PREDETERMINED PATTERN THEREON, SAID PARTICLES HAVING ELECTRICAL CHARGES OF ONE POLARITY ASSOCIATED THEREWITH,
Claim 19
Dependent Claim
28 words
PROVIDING AN ELECTRICAL POTENTIAL DIFFERENCE BETWEEN SAID TRANSFER MEMBER AND SAID CARRIER SURFACE WHEREBY SAID WEB ACQUIRES AN ELECTRICAL CHARGE OF OPPOSITE POLARITY TO SAID ONE POLARITY, AND
Claim 20
Dependent Claim
28 words
PROVIDING AN ELECTRICAL POTENTIAL DIFFERENCE BETWEEN SAID TRANSFER MEMBER AND SAID CARRIER SURFACE WHEREBY SAID WEB ACQUIRES AN ELECTRICAL CHARGE OF OPPOSITE POLARITY TO SAID ONE POLARITY, AND
Claim 21
Dependent Claim
28 words
providing an electrical potential difference between said transfer member and said carrier surface whereby said web acquires an electrical charge of opposite polarity to said one polarity, and
Claim 22
Dependent Claim
28 words
providing an electrical potential difference between said transfer member and said carrier surface whereby said web acquires an electrical charge of opposite polarity to said one polarity, and
Claim 23
Dependent Claim
27 words
providing an electrical potential difference between said transfer member and said carrier whereby said web acquires an electrical charge of opposite polarity to said one polarity, and
Claim 24
Dependent Claim
27 words
providing an electrical potential difference between said transfer member and said carrier whereby said web acquires an electrical charge of opposite polarity to said one polarity, and
Claim 25
Dependent Claim
3 words
A processing comprising:
Claim 26
Dependent Claim
3 words
A processing comprising:
Claim 27
Dependent Claim
50 words
separating said web from said carrier surface whereby said particles transfer to said second surface of said web with retention of said predetermined pattern, and applying a positive gaseous pressure to said web sufficient to separate said web from said transfer member while maintaining said particles in said predetermined pattern.
Claim 28
Dependent Claim
50 words
separating said web from said carrier surface whereby said particles transfer to said second surface of said web with retention of said predetermined pattern, and applying a positive gaseous pressure to said web sufficient to separate said web from said transfer member while maintaining said particles in said predetermined pattern.
Claim 29
Dependent Claim
24 words
separating said web from said carrier surface whereby said particles transfer to said second surface of said web with retention of said predetermined pattern.
Claim 30
Dependent Claim
24 words
separating said web from said carrier surface whereby said particles transfer to said second surface of said web with retention of said predetermined pattern.
Claim 31
Dependent Claim
24 words
SEPRATING SAID WEB FROM SAID CARRIER SURFACE WHEREBY SAID PARTICLES TRANSFER TO SAID SECOND SURFACE OF SAID WEB WITH RETENTION OF SAID PREDETERMINED P#ATTERN.
Claim 32
Dependent Claim
24 words
SEPRATING SAID WEB FROM SAID CARRIER SURFACE WHEREBY SAID PARTICLES TRANSFER TO SAID SECOND SURFACE OF SAID WEB WITH RETENTION OF SAID PREDETERMINED P#ATTERN.
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) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |