US4421428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal printer
Assignee: Canon Inc
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Filing: 1980-11-14
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Granted: 1983-12-20
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Expires: 2000-11-14
Abstract
Abstract The thermal printer pertinent to the present invention is of the type in which a heat sensitive paper having a coating of heat sensitive material on the upper side and a coating of heat fusible ink on the backside is used. A thermal head is brought into contact with the upper side surface under pressure to transfer the ink coated on the backside of the heat sensitive paper onto a common paper. According to the invention, a feed source of the heat sensitive paper and a feed source of the common paper are provided separately at different positions.
Inventors
- 👤 Atsushi Noda
- 👤 Takayoshi Hanakata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:35
CPC Classifications
B; B41; B41J; B41J15/00; B41J15/04; B41J15/06; B41J2/00; B41J2/315; B41J2/32
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
180 words
A thermal printer comprising: a thermal head a first recording medium having perforations; a second recording medium superimposed on said first recording medium and of a width less than that of said first recording medium, said second recording medium consisting of unperforated paper having a layer of heat sensitive material on its front surface and a layer of heat fusible ink on its rear surface the front surface being adjacent said thermal head; a first shaft disposed in the immediate vicinity of an imprinting station provided by said thermal head; sprocket roller means disposed at opposite ends of said first shaft for engaging the perforations in said first recording medium to feed it; rubber roller means disposed on said first shaft and located intermediate said sprocket roller means for driving said first and said second recording medium simultaneously; second shaft means for supporting a roll of said first recording medium rolled thereon; and third shaft means for supporting a roll of said second recording medium rolled thereon, said third shaft means being disposed between said first and second shaft means.
Claim 2
Dependent Claim
180 words
A thermal printer comprising: a thermal head a first recording medium having perforations; a second recording medium superimposed on said first recording medium and of a width less than that of said first recording medium, said second recording medium consisting of unperforated paper having a layer of heat sensitive material on its front surface and a layer of heat fusible ink on its rear surface the front surface being adjacent said thermal head; a first shaft disposed in the immediate vicinity of an imprinting station provided by said thermal head; sprocket roller means disposed at opposite ends of said first shaft for engaging the perforations in said first recording medium to feed it; rubber roller means disposed on said first shaft and located intermediate said sprocket roller means for driving said first and said second recording medium simultaneously; second shaft means for supporting a roll of said first recording medium rolled thereon; and third shaft means for supporting a roll of said second recording medium rolled thereon, said third shaft means being disposed between said first and second shaft means.
Claim 3
Dependent Claim
28 words
A thermal printer according to claim 1, wherein the width of said second recording medium is substantially the same as the imprintable region of said first recording medium.
Claim 4
Dependent Claim
166 words
A thermal printer comprising: a thermal head; a first recording medium having perforations; a second recording medium superimposed on said first recording medium and of a width less than of said first recording medium, said second recording medium consisting of unperforated paper having a layer of heat sensitive material on its one surface adjacent said thermal head and having a layer of heat fusible ink on its other surface; a first shaft disposed in the immediate vicinity of an imprinting station provided by said thermal head; sprocket roller means disposed at opposite ends of said first shaft for engaging the perforations in said first recording medium to feed it; rubber roller means disposed on said first shaft and located intermediate said sprocket roller means for driving said first and said second recording medium simultaneously; second shaft means for supporting said first recording medium; and third shaft means for supporting said second recording medium, said third shaft means being disposed between said first and second shaft means.
Claim 5
Dependent Claim
166 words
A thermal printer comprising: a thermal head; a first recording medium having perforations; a second recording medium superimposed on said first recording medium and of a width less than of said first recording medium, said second recording medium consisting of unperforated paper having a layer of heat sensitive material on its one surface adjacent said thermal head and having a layer of heat fusible ink on its other surface; a first shaft disposed in the immediate vicinity of an imprinting station provided by said thermal head; sprocket roller means disposed at opposite ends of said first shaft for engaging the perforations in said first recording medium to feed it; rubber roller means disposed on said first shaft and located intermediate said sprocket roller means for driving said first and said second recording medium simultaneously; second shaft means for supporting said first recording medium; and third shaft means for supporting said second recording medium, said third shaft means being disposed between said first and second shaft means.
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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) | 1986-12-19 | 1987-06-20 | 1987-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-19 | 1991-06-20 | 1991-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-19 | 1995-06-20 | 1995-12-20 | $7700.00 | Window Closed / Lapsed |