EP0388763A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Thermal transfer recording device
Assignee: Hitachi Ltd
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Filing: 1990-03-13
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Granted: —
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Expires: 2010-03-13
Abstract
Abstract A thermal transfer recording device including a thermal line head having heat generating elements thereon, a record paper in form of a roll of paper (1), a platen roller (2) disposed in opposition to the thermal band, an ink jet sheet interposed between the platen roller and the thermal head and extending on opposite sides with respect to the platen roller, and at least a first record paper transport device (5) disposed upstream in the transporting direction of the record paper with respect to the platen roller for at least feeding the record paper from the roll of paper toward the platen roller. At least a first wrapping member (25) disposed on the first record paper transport device side with respect to the platen roller and arranged for pressing the ink sheet (22) toward the platen roller when the thermal head is in a non-printing position floating above the platen roller so that a leading edge of the record paper transported by the first record transport device is guided by the ink sheet and by the wrapping member along the platen roller with sufficient tension to enable the leading edge of the record paper be fed without wrinking of the record paper through the path therefor extending from the first record transport device, and an arrangement is provided for moving the thermal head between the floating non-printing position thereof and a printing position in which the thermal head is pressed onto the platen roller with the ink sheet and record paper interposed therebetween for enabling recording without producing a print disabled marginal portion on the record paper.
Inventors
- 👤 Toshihiko Gotho
- 👤 Kohtarou Tanno
- 👤 Akira Shimizu
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 17:53
CPC Classifications
B; B41; B41J; B41J17/00; B41J17/22; B41J17/24; B41J15/00; B41J15/04; B41J15/06; B41J2/00; B41J2/315; B41J2/32; B41J2/325
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
260 words
A thermal transfer recording device comprising: a thermal line head including heat generating elements thereon; record paper in form of a roll of paper; a platen roller disposed in opposition to the thermal head; an ink sheet interposed between the platen roller and the thermal head and extending on opposite sides with respect to the platen roller; first record paper transport means disposed upstream in the transporting direction of the record paper with respect to the platen roller for at least feeding the record paper from the roll of paper toward the platen roller; wrapping means including at least a first wrapping member disposed on the first record paper transport means side with respect to the platen roller, the wrapping means being arranged for pressing the ink sheet toward the platen roller when the thermal head is in a non-printing position floating above the platen roller so that a leading edge of the first record paper transported by the record transport means is guided by the ink sheet and by the wrapping means along the platen roller with sufficient tension to enable the leading edge of the record paper be fed without wrinkling of the record paper through the path therefor extending from the first record transport means; and g) means for moving the thermal head between the floating non-printing position thereof and a printing position in which the thermal head is pressed onto the platen roller with the ink sheet and record paper interposed therebetween for enabling recording without producing a print disabled marginal portion on the record paper.
Claim 2
Dependent Claim
260 words
A thermal transfer recording device comprising: a thermal line head including heat generating elements thereon; record paper in form of a roll of paper; a platen roller disposed in opposition to the thermal head; an ink sheet interposed between the platen roller and the thermal head and extending on opposite sides with respect to the platen roller; first record paper transport means disposed upstream in the transporting direction of the record paper with respect to the platen roller for at least feeding the record paper from the roll of paper toward the platen roller; wrapping means including at least a first wrapping member disposed on the first record paper transport means side with respect to the platen roller, the wrapping means being arranged for pressing the ink sheet toward the platen roller when the thermal head is in a non-printing position floating above the platen roller so that a leading edge of the first record paper transported by the record transport means is guided by the ink sheet and by the wrapping means along the platen roller with sufficient tension to enable the leading edge of the record paper be fed without wrinkling of the record paper through the path therefor extending from the first record transport means; and g) means for moving the thermal head between the floating non-printing position thereof and a printing position in which the thermal head is pressed onto the platen roller with the ink sheet and record paper interposed therebetween for enabling recording without producing a print disabled marginal portion on the record paper.
Claim 3
Dependent Claim
75 words
A thermal transfer recording device according to Claim 1, wherein the ink sheet and the wrapping means enable feeding of the leading edge of the record paper so that the record paper and the ink sheet are wrapped around the platen roller over a predetermined first angular range of the platen roller delimited from a line of contact between the thermal head and the platen roller toward the direction of the first record transport means.
Claim 4
Dependent Claim
25 words
A thermal transfer recording device according to Claim 2, wherein the first predetermined angular range is a range of about 30 degrees to 80 degrees.
Claim 5
Dependent Claim
69 words
A thermal transfer recording device according to Claim 2, wherein the wrapping means further includes a second wrapping member disposed on the downstream side of the platen roller with respect to the direction of feeding of the leading edge of the record paper, the record transport means, wrapping means and ink sheet enabling automatic threading of the record paper from the roll of record paper about the platen roller.
Claim 6
Dependent Claim
109 words
A thermal transporting device according to Claim 1, wherein the ink sheet is in the form of a roll having different colors successively on different portions of a face thereof, and further comprising a second record paper transport means disposed downstream in the transporting direction of the record paper with respect to the platen roller, a record paper cutting means provided on the down stream side of the further record paper transport means, a first record paper guide is provide between the platen roller and the first record paper transport means, and a second record paper guide provided between the platen roller and the second record paper transport means.
Claim 7
Dependent Claim
86 words
A thermal transfer recording device according Claim 1, wherein the first record paper transport means includes a bi-directionally drivable rigid body driving roller and an elastic body driven roller for contacting the rigid body driving roller under pressure, the platen roller and the second record paper transport means each include clutch means receiving a driving force from a driving means therefor, the record paper being fed out from the roll of the record player by a torque smaller than a fixed value by the clutch means.
Claim 8
Dependent Claim
94 words
A thermal transfer recording device according to Claim 7, further comprising torque limiter means provided between the second record paper transport means and a driving means for the first record paper transport means, wherein when the record paper transport means is driven in a direction in which the record paper is fed out from the roll of the record paper, the driving speeds of the platen roller and the second record paper transport means in the forward feeding direction of the record paper are higher than the driving speed of the record transport means.
Claim 9
Dependent Claim
80 words
A thermal transfer recording device according to Claim 1, further comprising a head supporting member disposed for rocking motion coupled to the thermal head moving means by a positioning shaft extending substantially parallel to a shaft of the platen roller, the thermal head being supported on the head supporting member by a rocking shaft extending substantially perpendicularly to the positioning shaft and to the direction of movement of the thermal head into and out of contact with the platen roller.
Claim 10
Dependent Claim
80 words
A thermal transfer recording device according to Claim 9, further comprising means for rewinding an end of the record paper in a direction toward the first record paper transport means from a pressure contacting portion of the first wrapping member with the platen roller, and that ink of the different colors are printed in an overlapping relationship at the same location of the record paper using the ink sheet having different colors successively on different portions of the face thereof.
Claim 11
Dependent Claim
118 words
A thermal transfer recording device according to Claim 2, wherein the wrapping angles of the ink sheet and the record paper around the platen roller upon printing are set substantially to a range of 5 degrees to 15 degrees at a portion before printing and an angular range of substantially 30 degrees to 80 degrees at another portion after printing with reference to a position in which the ink sheet and the record paper are pressed by the heat generating elements of the thermal head, and wherein the portion before printing is supported for rotation on the thermal head and the portion after printing is positioned by the first wrapping member contacted under pressure with the platen roller.
References Cited (Backward Citations)
No citation records indexed.
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