US4348118A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paper transport means for a recording device
Assignee: Siemens AG
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Filing: 1981-03-20
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Granted: 1982-09-07
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Expires: 2001-03-20
Abstract
Abstract In an exemplary embodiment, the recording paper is transported by at least one drive capstan driven by a motor across a writing surface at which a fluid writer is disposed for writing. The object of the disclosure is to create a paper transport system which always avoids unnecessary contaminations due to writing fluid with certainty. This object is achieved in that the motor-driven drive capstan has a no-load indicator allocated to it which identifies no-load operation of the drive capstan and generates a shut-down signal for the fluid jet writer.
Inventors
- 👤 Bengt Skafvenstedt
- 👤 Sture Ahlgren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:31
CPC Classifications
G; G01; G01D; G01D15/00; G01D15/16
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
95 words
A paper transport system for a recording device with a receiving location for the unwritten recording paper and at least one motor-driven drive capstan having a motor for driving the same for the transport of the paper from the receiving location, a recording location at which a fluid jet writer is disposed for writing, characterized in that the motor-driven drive capstan (8) has a no-load indicator (13 through 19, 22, 23) allocated to it which identifies a no-load operation of the drive capstan (8) and generates a shut-down signal for the fluid jet writer (12).
Claim 2
Dependent Claim
95 words
A paper transport system for a recording device with a receiving location for the unwritten recording paper and at least one motor-driven drive capstan having a motor for driving the same for the transport of the paper from the receiving location, a recording location at which a fluid jet writer is disposed for writing, characterized in that the motor-driven drive capstan (8) has a no-load indicator (13 through 19, 22, 23) allocated to it which identifies a no-load operation of the drive capstan (8) and generates a shut-down signal for the fluid jet writer (12).
Claim 3
Dependent Claim
113 words
A paper transport system according to claim 1, characterized in that the no-load indicator comprises a comparator (15) having first and second inputs, first means for supplying a first signal (U1) at said first input with said first signal increasingly rising in steps with an increasing load of the drive capstan (8) and second means for supplying a second signal (U2) to said second input with said second signal being adjusted in amplitude as a comparison signal in such manner that, in terms of value, it lies between the voltage value of said first signal for no-load operation and the voltage value of said first signal for operating load on the drive capstan.
Claim 4
Dependent Claim
44 words
A paper transport system according to claim 2, characterized in that the comparator (15) generates a stop signal for the fluid jet writer (12) when the first signal (U1) indicating the operation condition of the drive capstan (8) falls below said second signal (U2).
Claim 5
Dependent Claim
34 words
A paper transport system according to claim 3, characterized in that the comparator (15) generates a start signal for the fluid jet writer (12) when the first signal (U1) exceeds said second signal (U2).
Claim 6
Dependent Claim
49 words
A paper transport system according to claim 4, characterized in that a fluid jet writer (12) comprises a controllable valve (20) for the recording fluid, said valve (20) being closed by means of a stop signal of the comparator (15) and being opened by means of a start signal.
Claim 7
Dependent Claim
59 words
A paper transport system according to claim 1, characterized in that the recording paper (2) is cut out at the end of its track in such manner that the cut-out part (28,30) proceeds free of the drive capstan (8) before the end of the recording paper (2) has left the recording location (27) of the fluid jet writer (12).
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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) | 1985-09-06 | 1986-03-08 | 1986-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-06 | 1990-03-08 | 1990-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-06 | 1994-03-08 | 1994-09-07 | $7700.00 | Window Closed / Lapsed |