US3851236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for automatically controlling the speed of travel of an original and of copying material in a copying machine
Assignee: Kalle GmbH and Co KG
•
Filing: 1973-02-27
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Granted: 1974-11-26
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Expires: 1993-02-27
Abstract
Abstract Apparatus is disclosed for automatically controlling the speed of travel of an original and of copying material in dependence upon the transparency of the original and upon the photosensitivity of the copying material, for use in a copying machine that contains at least two kinds of copying materials selectible by the original and which includes at least one photosensitive device for measuring the transparency of the original and a driving motor the speed of which can be controlled by the output signal from the photosensitive measuring unit. The apparatus comprises at least two amplifier means which may be connected selectively into a control circuit for the driving motor, a preselector switch means associated with each kind of copying material, which switch means may be connected into the control circuit and by means of which an amplifier means for the kind of copying material may be preselected, and a sensing means in the path of travel of the original associated with each kind of copying material which is effective, upon actuation by the original, to switch the preselector switch means associated with the selected kind of copying material, and the amplifier means preselected by the switch, into the control circuit.
Inventors
- 👤 W Dennhardt
- 👤 H Schroter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:57
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/72; G03B27/80; Y; Y10; Y10S; Y10S388/00; Y10S388/923; Y10S388/93
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
177 words
Apparatus for automatically controlling the speed of travel of an original and of copying material in dependence upon the transparency of the original and upon the photosensitivity of the copying material, for use in a copying machine that contains at least two kinds of copying materials selectible by the original and which includes at least one photosensitive measuring unit for measuring the transparency of the original and a driving motor the speed of which is controlled by the output signal from said photosensitive measuring unit, which apparatus comprises at least two amplifier means, a preselector switch means associated with each kind of copying material whereby one of said amplifier means is preselected for the kind of copying material which is associated with said switch, and a sensing means in the path of travel of the original associated with each kind of copying material which is effective, upon actuation by the original, to switch the preselector switch means associated with the selected kind of copying material, and the amplifier means preselected by the switch, into the control circuit.
Claim 2
Dependent Claim
177 words
Apparatus for automatically controlling the speed of travel of an original and of copying material in dependence upon the transparency of the original and upon the photosensitivity of the copying material, for use in a copying machine that contains at least two kinds of copying materials selectible by the original and which includes at least one photosensitive measuring unit for measuring the transparency of the original and a driving motor the speed of which is controlled by the output signal from said photosensitive measuring unit, which apparatus comprises at least two amplifier means, a preselector switch means associated with each kind of copying material whereby one of said amplifier means is preselected for the kind of copying material which is associated with said switch, and a sensing means in the path of travel of the original associated with each kind of copying material which is effective, upon actuation by the original, to switch the preselector switch means associated with the selected kind of copying material, and the amplifier means preselected by the switch, into the control circuit.
Claim 3
Dependent Claim
49 words
Apparatus as claimed in claim 1 including a control unit associated with each kind of copying material by means of which control unit the sensing means may be actuated by the original, which control unit simultaneously may block the control units associated with the other kinds of copying material.
Claim 4
Dependent Claim
72 words
at least one switching element means for retrieval and erasure purposes, which switching element means, upon being actuated by the leading edge of an original, operates a second stepping switch unit, so that a. the stored signal caused by the original is passed by way of an amplifier means to a regulator for regulating the speed of the driving motor, and b. the stored signal caused by the preceding original is erased.
Claim 5
Dependent Claim
72 words
at least one switching element means for retrieval and erasure purposes, which switching element means, upon being actuated by the leading edge of an original, operates a second stepping switch unit, so that a. the stored signal caused by the original is passed by way of an amplifier means to a regulator for regulating the speed of the driving motor, and b. the stored signal caused by the preceding original is erased.
Claim 6
Dependent Claim
16 words
Apparatus as claimed in claim 1 wherein the amplifier means comprise amplifiers having different amplification characteristics.
Claim 7
Dependent Claim
27 words
Apparatus as claimed in claim 1 wherein the amplifier means all contain the same amplifier to which are connected resistors that are different for each amplifier means.
Claim 8
Dependent Claim
38 words
Apparatus as claimed in claim 1 including a regulator means whereby the driving motor may be controlled, a voltage corresponding to a suitable minimum speed being continuously applied to said regulator means while the apparatus is in operation.
Claim 9
Dependent Claim
34 words
Apparatus as claimed in claim 1 which also includes a delay unit controllable by the sensing means to switch the driving motor to a suitable idling speed when an original leaves the exposure unit.
Claim 10
Dependent Claim
24 words
Apparatus as claimed in claim 1 wherein there are disposed in the path of travel of the original and downstream of the exposure unit:
Claim 11
Dependent Claim
20 words
Apparatus as claimed in claim 1 wherein at least two amplifier means are provided for each kind of copying material.
Claim 12
Dependent Claim
44 words
Apparatus as claimed in claim 1 wherein there is associated with each kind of copying material an amplifier which may be connected in series with the amplifier means preselected for the kind of copying material, when the sensing means is actuated by an original.
Claim 13
Dependent Claim
25 words
Apparatus as claimed in claim 1 wherein the photosensitive device comprises a plurality of photosensitive elements, arranged so as to be offset from each other.
Claim 14
Dependent Claim
31 words
Apparatus as claimed in claim 10 wherein a discriminator is connected downstream from the photosensitive device to select from the measured output signal the output signal corresponding to the greatest transparency.
Claim 15
Dependent Claim
39 words
Apparatus as claimed in claim 1 wherein the sensing means comprises at least one switching element associated with each kind of copying material arranged in the path of travel of the original to sense the width of the original.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |