US4335951A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fusing apparatus
Assignee: Pitney Bowes Inc
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Filing: 1980-06-23
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Granted: 1982-06-22
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Expires: 2000-06-23
Abstract
Abstract A pressure fusing apparatus for use in a xerographic copying machine for fixing a developed toner image to a copy sheet. The apparatus includes in combination a first roller adapted to be rotatably mounted and driven within the copying machine; an arcuately shaped support member, the inner surface of which is spaced from and lies substantially parallel to a portion of the outer surface of the first roller; and a plurality of second smaller rollers mounted for rolling contact about the arcuately shaped support member, the second rollers and the first roller adapted to form a series of nips through which copy sheets being fused pass.
Inventors
- 👤 Albert W. Scribner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:41
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2092
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
125 words
A pressure fusing apparatus for use in a xerographic copying machine for fixing a developed toner image to a copy sheet comprising in combination a first roller adapted to be rotatably mounted and driven within said machine; an arcuately shaped support member, the inner surface of which is spaced from and lies substantially parallel to a portion of the outer surface of said first roller; spring means for biasing said arcuately shaped support member toward said first roller; and a plurality of interconnected second rollers having a smaller outside diameter than said first roller mounted for rolling contact about said arcuately shaped support member, said second rollers and said first roller adapted to form a series of nips through which copy sheets being fused pass.
Claim 2
Dependent Claim
125 words
A pressure fusing apparatus for use in a xerographic copying machine for fixing a developed toner image to a copy sheet comprising in combination a first roller adapted to be rotatably mounted and driven within said machine; an arcuately shaped support member, the inner surface of which is spaced from and lies substantially parallel to a portion of the outer surface of said first roller; spring means for biasing said arcuately shaped support member toward said first roller; and a plurality of interconnected second rollers having a smaller outside diameter than said first roller mounted for rolling contact about said arcuately shaped support member, said second rollers and said first roller adapted to form a series of nips through which copy sheets being fused pass.
Claim 3
Dependent Claim
34 words
A pressure fusing apparatus according to claim 1 wherein the outside diameter of each of said second rollers is about 3/16 inch and the outside diameter of said first roller is about 2 inches.
Claim 4
Dependent Claim
25 words
A pressure fusing apparatus according to claim 1 wherein said spring means in positioned at each of the outer end portions of said support member.
Claim 5
Dependent Claim
26 words
A pressure fusing apparatus according to claim 1 wherein said second rollers are driven around said arcuate member by frictional contact with said driven first roller.
Claim 6
Dependent Claim
58 words
A pressure fusing apparatus according to claim 1 wherein said apparatus is a heat pressure fusing apparatus and further comprises heating means for heating said second rollers whereby a combination of heat and pressure is applied to said copy sheet as it passes through said nip and into the area of contact between said first and second rollers.
Claim 7
Dependent Claim
17 words
A pressure fusing apparatus according to claim 1 wherein said apparatus is a cold pressure fusing apparatus.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-06-21 | 1985-12-21 | 1986-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-21 | 1989-12-21 | 1990-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-21 | 1993-12-21 | 1994-06-22 | $7700.00 | Window Closed / Lapsed |