Patent US3612820A successfully refreshed from Google Patents.
US3612820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-fixing apparatus for lengthy fusible material
Assignee: Xerox Corp
•
Filing: 1969-12-12
•
Granted: 1971-10-12
•
Expires: 1989-12-12
Abstract
Abstract A fixing system for fixing fusible material such as electroscopic particles upon wide support material embodying the principle of low-thermal losses for conserving heat. The system includes two rollers in pressure contact between which the support material is transported. One of the rollers is heated from an interior lamp which remains fixed so that portions of the roller along its entire length are heated continuously and conducted to the side of the support material carrying the particles. The heated roller is driven externally by a plurality of roller members positioned at the ends thereof to enable heat losses to support fixtures to be minimized.
Inventors
- 👤 Frazier D Punnett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:20
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2064; H; H05; H05B; H05B3/00; H05B3/0095
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
171 words
A contact heat-fusing apparatus of the type having two fusing members each mounted for rotation in an endless path and arranged in contact and adapted to receive and move a support material carrying thermoplastic particles in image configuration for fixing the image the improvement comprising a frame, lamp means associated with one of said fusing members supported in said frame and adapted when energized to flow heat radially outwardly at a sufficient temperature for tacking and fixing image particles, a cylindrical member supported by said frame enclosing said lamp means and extending in parallel relation therewith, drive means for applying force to the exterior of said cylindrical member to cause rotation thereof with a minimal of heat loss to the surrounding area, said drive means includes a plurality of roller members positioned at the ends of said cylindrical member, each of said driving rollers having a flange portion arranged in contact with the terminal portions of said cylindrical member whereby lengthwise expansion and contraction of the cylindrical member may be effected.
Claim 2
Dependent Claim
171 words
A contact heat-fusing apparatus of the type having two fusing members each mounted for rotation in an endless path and arranged in contact and adapted to receive and move a support material carrying thermoplastic particles in image configuration for fixing the image the improvement comprising a frame, lamp means associated with one of said fusing members supported in said frame and adapted when energized to flow heat radially outwardly at a sufficient temperature for tacking and fixing image particles, a cylindrical member supported by said frame enclosing said lamp means and extending in parallel relation therewith, drive means for applying force to the exterior of said cylindrical member to cause rotation thereof with a minimal of heat loss to the surrounding area, said drive means includes a plurality of roller members positioned at the ends of said cylindrical member, each of said driving rollers having a flange portion arranged in contact with the terminal portions of said cylindrical member whereby lengthwise expansion and contraction of the cylindrical member may be effected.
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) | 1974-10-11 | 1975-04-12 | 1975-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-11 | 1979-04-12 | 1979-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-11 | 1983-04-12 | 1983-10-12 | $7700.00 | Window Closed / Lapsed |