US4437102A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-sensitive recording apparatus
Assignee: Fujifilm Business Innovation Corp
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Filing: 1981-11-10
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Granted: 1984-03-13
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Expires: 2001-11-10
Abstract
Abstract The adjustment of pressure between the thermal head assembly and back roll in a thermal recording device is achieved by adjusting the bias force applied to the thermal head rather than the back roll, to thereby maintain a substantially constant contact pressure between the back roll and a drive roll.
Inventors
- 👤 Toshiharu Inui
- 👤 Haruhiko Moriguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:31
CPC Classifications
B; B41; B41J; B41J25/00; B41J25/304; B41J25/312; G; G01; G01D; G01D15/00; G01D15/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
173 words
A heat sensitive recording apparatus, comprising: a thermal head assembly for selectively causing heat generating elements to generate heat according to image data; a back roll for maintaining pressure against said thermal head assembly to sandwich a thermally sensitive recording medium and a printing sheet therebetween; a rotatable back roll mounting arm for mounting said back roll thereon, a position of said back roll being substantially fixed by said back roll mounting arm during a recording operation; at least one adjustable spring urging said thermal head assembly toward said back roll with an adjustable force; said thermal head assembly including a first surface for contacting said recording medium and a second surface opposite said first surface, said spring exerting a force against said second surface and toward said back roll; and a drive roller contacting said back roll at a position downstream of a position where said recording medium and said printing sheet are sandwiched between said thermal head assembly and said back roll to drive said back roll during a recording operation.
Claim 2
Dependent Claim
173 words
A heat sensitive recording apparatus, comprising: a thermal head assembly for selectively causing heat generating elements to generate heat according to image data; a back roll for maintaining pressure against said thermal head assembly to sandwich a thermally sensitive recording medium and a printing sheet therebetween; a rotatable back roll mounting arm for mounting said back roll thereon, a position of said back roll being substantially fixed by said back roll mounting arm during a recording operation; at least one adjustable spring urging said thermal head assembly toward said back roll with an adjustable force; said thermal head assembly including a first surface for contacting said recording medium and a second surface opposite said first surface, said spring exerting a force against said second surface and toward said back roll; and a drive roller contacting said back roll at a position downstream of a position where said recording medium and said printing sheet are sandwiched between said thermal head assembly and said back roll to drive said back roll during a recording operation.
Claim 3
Dependent Claim
23 words
The heat sensitive recording apparatus as claimed in claim 1, wherein said back roll is directly mounted on said back roll mounting arm.
Claim 4
Dependent Claim
30 words
The heat sensitive recording apparatus as claimed in claim 1, further comprising an unadjustable spring, said back roll being mounted on said back roll mounting arm by said unadjustable spring.
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) | 1987-03-13 | 1987-09-12 | 1988-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-13 | 1991-09-12 | 1992-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-13 | 1995-09-12 | 1996-03-13 | $7700.00 | Window Closed / Lapsed |