Patent US3860341A successfully refreshed from Google Patents.
US3860341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic light exposure device for the graphic arts
Assignee: Individual
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Filing: 1973-08-29
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Granted: 1975-01-14
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Expires: 1993-08-29
Abstract
Abstract The present device provides a means to automatically force photosensitive materials into close contact with either a negative or a positive depending upon what type of print is to be produced. In addition, the present device employs a mercury lamp as its light source because of its wealth of ultraviolet light. The present arrangement acts to keep the mercury lamp on at all times and to automatically expose the photosensitive materials to the mercury lamp for the proper amount of time only after the photosensitive materials have been forced into close contact with the negative (or positive). The negative and the positive will hereinafter be referred to as the transfer image means. Thereafter the lamp is automatically turned off and the member forcing said close contact between the photosensitive material and the transfer image means is released.
Inventors
- 👤 Philip E Tobias
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:43
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/02; G03B27/14; G03B27/16; G03B27/18; G03B27/20
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
328 words
An automatic light exposure device comprising in combination: housing means; transparent means disposed to form the top of said housing means; lid means movably secured to said housing means and formed and disposed to fit over and come in contact with said transparent means; flexible means disposed to form a substantial portion of the side of said lid means which comes in contact with said transparent meAns; vacuum effecting means connected to said flexible means to effect a substantial vacuum between said transparent means and said flexible means in response to said lid means coming in contact with said transparent means thereby providing a force against said flexible means toward said transparent means; lamp means; shutter means disposed to cover said lamp means when closed and to expose said lamp means when open; shutter moving means connected to said shutter means to cause said shutter means to open and close; timing means; switch means disposed on said lid means to be switched when said lid means comes in contact with said transparent means; vacuum detecting means connected to said vacuum effecting means to detect said substantial vacuum and in response thereto to provide a signal for activating said shutter moving means; and control circuitry means connected between said switch means, said vacuum detecting means, said shutter moving means, said timing means, and said vacuum effecting means whereby when said switch means is switched said vacuum effecting means effects said substantial vacuum so that said force causes said flexible means to come in close contact with said transparent means and whereby said vacuum detecting means provides a signal to cause said shutter moving means to move said shutter means to expose said lamp means for a predetermined time, as determined by said timing means, and whereby at the end of said predetermined time said shutter moving means closes said shutter means and whereby said vacuum effecting means terminates effecting a vacuum to remove said force from said flexible means.
Claim 2
Dependent Claim
328 words
An automatic light exposure device comprising in combination: housing means; transparent means disposed to form the top of said housing means; lid means movably secured to said housing means and formed and disposed to fit over and come in contact with said transparent means; flexible means disposed to form a substantial portion of the side of said lid means which comes in contact with said transparent meAns; vacuum effecting means connected to said flexible means to effect a substantial vacuum between said transparent means and said flexible means in response to said lid means coming in contact with said transparent means thereby providing a force against said flexible means toward said transparent means; lamp means; shutter means disposed to cover said lamp means when closed and to expose said lamp means when open; shutter moving means connected to said shutter means to cause said shutter means to open and close; timing means; switch means disposed on said lid means to be switched when said lid means comes in contact with said transparent means; vacuum detecting means connected to said vacuum effecting means to detect said substantial vacuum and in response thereto to provide a signal for activating said shutter moving means; and control circuitry means connected between said switch means, said vacuum detecting means, said shutter moving means, said timing means, and said vacuum effecting means whereby when said switch means is switched said vacuum effecting means effects said substantial vacuum so that said force causes said flexible means to come in close contact with said transparent means and whereby said vacuum detecting means provides a signal to cause said shutter moving means to move said shutter means to expose said lamp means for a predetermined time, as determined by said timing means, and whereby at the end of said predetermined time said shutter moving means closes said shutter means and whereby said vacuum effecting means terminates effecting a vacuum to remove said force from said flexible means.
Claim 3
Dependent Claim
46 words
An automatic light exposure device according to claim 1 wherein said control circuitry includes a lamp power circuit which causes said lamp to be illuminated to less than maximum intensity when said shutters are closed and alternatively illuminated to maximum intensity when said shutters are open.
Claim 4
Dependent Claim
16 words
An automatic exposure device according to claim 2 wherein said lamp is a mercury arc lamp.
Claim 5
Dependent Claim
72 words
An automatic exposure device according to claim 1 wherein said vacuum effecting means comprises a vacuum pump with a tube connected thereto and a solenoid valve connected between said tube end atmosphere and wherein said control circuitry means is connected to said solenoid valve to close said valve to the atmosphere when said vacuum pump is operating and to open said valve to the atmosphere when said vacuum pump is not operating.
Claim 6
Dependent Claim
29 words
An automatic light exposure device according to claim 1 wherein there is further included means to lift said lid whereby when said force is terminated said lid automatically lifts.
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) | 1978-01-13 | 1978-07-15 | 1979-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-13 | 1982-07-15 | 1983-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-13 | 1986-07-15 | 1987-01-14 | $7700.00 | Window Closed / Lapsed |