Patent US4527174A successfully refreshed from Google Patents.
US4527174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sheet pressing mechanism in a pen type recording device
Assignee: Alps Alpine Co Ltd
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Filing: 1983-06-23
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Granted: 1985-07-02
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Expires: 2003-06-23
Abstract
Abstract A sheet pressing mechanism in a pen type recording device including a rotatable platen and a pen adapted to move in the axial direction of the platen while contacting the platen, in which pressure rollers are brought into contact with outer peripheral surfaces of end portions of the platen, the pressure rollers being rotatably mounted on a support shaft extending in parallel with the axis of the platen, and in which the said outer peripheral surfaces of the end portions of the platen are formed of a soft material capable of being depressed by the contact pressure of the pressure rollers.
Inventors
- 👤 Mitsugu Fujiwara
- 👤 Yoshinori Sakaue
- 👤 Tomio Aso
- 👤 Koshiro Kurokawa
- 👤 Hideo Obara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:33
CPC Classifications
B; B41; B41J; B41J13/00; B41J13/02; B41J13/076; B41J11/00; B41J11/02; B41J11/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
132 words
A sheet holding mechanism in a pen type recording device including a rotatable platen and a pen adapted to move in the axial direction of the platen while contacting paper held against the platen for forming images on a portion of the paper held against a central portion of the platen, said sheet holding mechanism including pressure rollers brought into pressure contact with outer peripheral surfaces of the end portions of said platen, said pressure rollers being rotatably mounted on a support shaft extending in parallel with the axis of said platen, said outer peripheral surfaces of the end portions of said platen being formed of a material softer than the material forming the central portion of the platen and capable of being indented by the contact pressure of said pressure rollers.
Claim 2
Dependent Claim
132 words
A sheet holding mechanism in a pen type recording device including a rotatable platen and a pen adapted to move in the axial direction of the platen while contacting paper held against the platen for forming images on a portion of the paper held against a central portion of the platen, said sheet holding mechanism including pressure rollers brought into pressure contact with outer peripheral surfaces of the end portions of said platen, said pressure rollers being rotatably mounted on a support shaft extending in parallel with the axis of said platen, said outer peripheral surfaces of the end portions of said platen being formed of a material softer than the material forming the central portion of the platen and capable of being indented by the contact pressure of said pressure rollers.
Claim 3
Dependent Claim
28 words
A sheet holding mechanism according to claim 1, said outer peripheral surfaces of the end portion of the platen having a diameter greater than the central portion thereof.
Claim 4
Dependent Claim
63 words
A sheet holding mechanism according to claim 2, further including a respective wheel having teeth adapted to bite within the undersurface of said paper and fitted between said central portion of the platen and the outer peripheral surfaces thereof, whereby said pressure rollers increase the length of the teeth biting into said paper as they indent the outer peripheral portions of the platen.
Claim 5
Dependent Claim
63 words
A sheet holding mechanism according to claim 1, further including a respective wheel having teeth adapted to bite within the undersurface of said paper and fitted between said central portion of the platen and the outer peripheral surfaces thereof, whereby said pressure rollers increase the length of the teeth biting into said paper as they indent the outer peripheral portions of the platen.
References Cited (Backward Citations)
US3522903A
Cited
US4439778A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-07-01 | 1988-12-31 | 1989-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-01 | 1992-12-31 | 1993-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-01 | 1996-12-31 | 1997-07-02 | $7700.00 | Window Closed / Lapsed |