EP0348176A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Thermal printing system
Assignee: Shinko Electric Co Ltd
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Filing: 1989-06-21
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Granted: —
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Expires: 2009-06-21
Abstract
Abstract To facilitate the removal of crumpled paper sheets from a thermal printing machine the pinch roller or rollers (2) that hold the sheet against the platen (1) have associated with them a means for depressing or releasing the roller or rollers away from the platen when the machine is opened. For this purpose there is provided an operating lever (12 or 14) for effecting the depressing or releasing motion. In one example the lever rotating a cam positioned between a pair of pinch roller levers to move the rollers apart and so allow the crumpled sheet to be removed. In another example the lever itself acts as a cam or a wedge to move the rollers apart.
Inventors
- 👤 Kiyoshige Ishiyama
- 👤 Takeshi Okuno
- 👤 Hiromitsu Ogita
- 👤 Susumu Mitsushima
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 14:26
CPC Classifications
B; B41; B41J; B41J25/00; B41J25/304; B41J25/316
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
161 words
A thermal printing system, comprising: a lower frame,an upper frame capable of being opened or closed with respect to said lower frame,a platen disposed at either one of said lower frame or upper frame,a pair of pinch rollers disposed being swingably urged by a resilient force and each of them being oppositely faced with each other so that the both rollers in the pair are urged to hold and are depressed to the surface of said platen from its opposite sides,and performs printing by squeezing a paper sheet therebetween when said pair of pinch rollers are in resiliently depressed state,wherein; said thermal printing system further comprises a depression/releasing lever actuated in connection with the user's opening or closing of said upper frame with respect to said lower frame,whereby the extent of opening between said pair of pinch rollers can be widened against said resilient force so that the paper sheet in a crumpled state can be taken away for subsequent printing.
Claim 2
Dependent Claim
161 words
A thermal printing system, comprising: a lower frame,an upper frame capable of being opened or closed with respect to said lower frame,a platen disposed at either one of said lower frame or upper frame,a pair of pinch rollers disposed being swingably urged by a resilient force and each of them being oppositely faced with each other so that the both rollers in the pair are urged to hold and are depressed to the surface of said platen from its opposite sides,and performs printing by squeezing a paper sheet therebetween when said pair of pinch rollers are in resiliently depressed state,wherein; said thermal printing system further comprises a depression/releasing lever actuated in connection with the user's opening or closing of said upper frame with respect to said lower frame,whereby the extent of opening between said pair of pinch rollers can be widened against said resilient force so that the paper sheet in a crumpled state can be taken away for subsequent printing.
Claim 3
Dependent Claim
141 words
A thermal printing system as claimed in claim 1, wherein said platen and said pair of pinch rollers are received in said upper frame,and said depression/release lever together with a cam are rotatably received at its one end by a supporting pin disposed at the intermediate portion between said pair of pinch roller levers,and the other end of said lever allows said cam to rotate when said upper frame is raised upward to take open position so that the opening between said pair of pinch rollers can be widened against said resilient force thereby enabling the crumpled paper sheet to be taken away,while said lever restrict the movement of said cam and let said pair of pinch rollers approach together and are depressed on the surface of said platen by said resilient force ready for feeding a paper sheet for printing.
Claim 4
Dependent Claim
209 words
A thermal printing system as claimed in claim 1, wherein said platen and said pair of pinch rollers are received in said lower frame,and said depression/release lever is rendered engageable at its one end with a part of said upper frame,and is swingably received by a support pin at its intermediate portion,and the other end of said lever is rendered engageable with each inside face of each support pin of said pair of pinch rollers,whereby when said upper frame is raised upward to take open position,the other end of said depression/release lever is placed under contact with said inside face of each support pin of said pair of pinch rollers and widens the opening between said pair of pinch rollers against said resilient force and enables the crumpled paper sheet to be taken away,while the one end of said lever restrict the movement of said the other end to engage the inside facacof said pair of support pins of said pinch rollers when said upper frame is lowered down to close the upper frame so that the pair of pinch rollers are allowed to approach together and are depressed on the s urface of said platen by said resilient force ready for feed ing a paper sheet for printing.
Claim 5
Dependent Claim
175 words
A thermal printing system as claimed in claim 2, wherein said depressing/releasing lever is disposed so that its front end can move away from or engage with said lower frame in connection with the opening or closing of said upper frame,and is provided with a cam coupled by a connecting pin to said depression/release lever,and said cam normally does not act on said pinch roller levers,but is rotatably received by a supporting pin disposed at the intermediate portion between said pair of pinch roller levers,and the other end of said lever allows said cam to rotate when said upper frame is raised upward to take open position so that the opening between said pair of pinch rollers can be widened against said resilient force thereby enabling the crumpled paper sheet to be taken away, while said lever restricts the movement of said cam and let said pair of pinch rollers approach together and are depressed on the surface of said platen by said resilient force to be ready for feeding a paper sheet for printing.
Claim 6
Dependent Claim
165 words
A thermal printing system as claimed in claim 3,wherein the other end of said depressing/releasing lever having cam or wedge like protrusions advances and acts to widen the space between oppositely facing pair of pinch rollers against said pinch roller tensioning spring and releases the pinch rollers from their depressed contact with said platen when said upper frame is swingably raised upward to its open position,while the other end of said depression/release lever is restricted from its advance movement so that said cam or wedge like protrusions can leave away from the contact with said pair of pinch roller supporting pins and allows said pair of pinch rollers to move to approach with each other and resiliently contact the surface of said platen when said upper frame is lowered down to its closed position; whereby depressing or releasing of said pinch rollers on the platen can be effected automatically in connection with the user's closing or opening of said upper frame to the lower frame.
Claim 7
Dependent Claim
126 words
A thermal printing machine comprising a pair of frame parts relatively movable between an operative position for printing and a non-operative position, one of said parts carrying a platen, and at least one pinch roller being resiliently biased towards the platen to hold a sheet to be printed against the platen, characterised in that an operating member is provided that is displaceable by the relative movement of said frame parts and co-operates with said at least one roller such that said roller is displaced against said resilient bias and away from the platen when said parts are relatively located in the non-operative position, and said roller is allowed to return to its biased position towards the roller when said parts are located in the operative position.
Claim 8
Dependent Claim
126 words
A thermal printing machine comprising a pair of frame parts relatively movable between an operative position for printing and a non-operative position, one of said parts carrying a platen, and at least one pinch roller being resiliently biased towards the platen to hold a sheet to be printed against the platen, characterised in that an operating member is provided that is displaceable by the relative movement of said frame parts and co-operates with said at least one roller such that said roller is displaced against said resilient bias and away from the platen when said parts are relatively located in the non-operative position, and said roller is allowed to return to its biased position towards the roller when said parts are located in the operative position.
References Cited (Backward Citations)
No citation records indexed.
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