US3738748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic printer
Assignee: Individual
•
Filing: 1971-06-09
•
Granted: 1973-06-12
•
Expires: 1991-06-09
Abstract
Abstract There is provided a contact printer comprising a cabinet having a high intensity light source mounted within the cabinet, with a reflector fixedly mounted in the cabinet for directing a uniform beam of light toward the top of the cabinet where a printing frame is pivotally mounted about a central axis thereof. Because of the mounting of the frame, the top side of the frame may be loaded and then the loaded side may be pivoted downwardly toward the light source. It is desirable to use a high intensity light source in a suitable spectrum range to provide rapid exposure of the sensitized materials. One such light source advantageously is maintained in a reduced standby condition when the materials are not actually being exposed. When the lamp is in such standby condition, a shade or curtain is closed over the lamp to prevent blinding of an operator during pivoting of the printing frame.
Inventors
- 👤 R Weihsmantel
- 👤 H Benson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:34
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/02; G03B27/14; G03B27/16
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
195 words
A contact printer for use in exposing sheet sensitized material and the like, comprising a cabinet, a source of printing light mounted in the lower portion of said cabinet for directing light toward the top of said cabinet, a printing frame including a planar surface for supporting said sheet material in a horizontal position by exposure, mounting means for supporting said frame in the top of said cabinet, light controlling shutter means between said light source and said printing frame, said shutter means including a plurality of shutter panels mounted for relative sliding movement in a direction generally transverse of the direction of light between said source and said frame each of said shutter panels including at least one edge flange interlockable with a flange of an adjacent panel permitting relative sliding movement therebetween in one direction and interconnecting said panels for movement together in an opposite direction when said shutter is opened and closed, and means for controlling said light source to operate at a low, standby level and a high intensity, exposing level, and shutter drive means for opening and closing said panels in synchronism with changes in level of said light source.
Claim 2
Dependent Claim
195 words
A contact printer for use in exposing sheet sensitized material and the like, comprising a cabinet, a source of printing light mounted in the lower portion of said cabinet for directing light toward the top of said cabinet, a printing frame including a planar surface for supporting said sheet material in a horizontal position by exposure, mounting means for supporting said frame in the top of said cabinet, light controlling shutter means between said light source and said printing frame, said shutter means including a plurality of shutter panels mounted for relative sliding movement in a direction generally transverse of the direction of light between said source and said frame each of said shutter panels including at least one edge flange interlockable with a flange of an adjacent panel permitting relative sliding movement therebetween in one direction and interconnecting said panels for movement together in an opposite direction when said shutter is opened and closed, and means for controlling said light source to operate at a low, standby level and a high intensity, exposing level, and shutter drive means for opening and closing said panels in synchronism with changes in level of said light source.
Claim 3
Dependent Claim
57 words
A contact printer as set forth in claim 1 wherein a pair of said shutter panels is movable from an open position nested upon one another adjacent an outside portion of said cabinet toward a closed position adjacent the center of said cabinet wherein a minimum of overlapping between the edges of adjacent shutter panels is provided.
Claim 4
Dependent Claim
209 words
A contact printer for use in exposing sheet sensitized material and the like, comprising a cabinet, a source of printing light mounted in the lower portion of said cabinet for directing light toward the top of said cabinet, a printing frame including a planar surface for supporting said sheet material in a horizontal position by exposure, mounting means for supporting said frame in the top of said cabinet, light controlling shutter means between said light source and said printing frame, said shutter means incLuding a plurality of shutter panels mounted for relative sliding movement in a direction generally transverse of the direction of light between said source and said frame, said shutter means comprising opposite half portions, each portion comprising a plurality of said shutter panels pivotally connected together along opposite edges and movable between an open position wherein said connected panels are in accordionlike arrays adjacent opposite sides of said cabinet and a closed position wherein said panels are substantially aligned edge to edge in a common plane, and means for controlling said light source to operate at a low, standby level and a high intensity, exposing level, and shutter drive means for opening and closing said panels in synchronism with changes in level of said light source.
Claim 5
Dependent Claim
209 words
A contact printer for use in exposing sheet sensitized material and the like, comprising a cabinet, a source of printing light mounted in the lower portion of said cabinet for directing light toward the top of said cabinet, a printing frame including a planar surface for supporting said sheet material in a horizontal position by exposure, mounting means for supporting said frame in the top of said cabinet, light controlling shutter means between said light source and said printing frame, said shutter means incLuding a plurality of shutter panels mounted for relative sliding movement in a direction generally transverse of the direction of light between said source and said frame, said shutter means comprising opposite half portions, each portion comprising a plurality of said shutter panels pivotally connected together along opposite edges and movable between an open position wherein said connected panels are in accordionlike arrays adjacent opposite sides of said cabinet and a closed position wherein said panels are substantially aligned edge to edge in a common plane, and means for controlling said light source to operate at a low, standby level and a high intensity, exposing level, and shutter drive means for opening and closing said panels in synchronism with changes in level of said light source.
Claim 6
Dependent Claim
61 words
The contact printer as set forth in claim 3 including a plurality of pivotal pins for hingedly connecting adjacent shutter panels, alternate ones of said pivotal pins including opposite end portions extending outwardly of opposite ends of said panels, and support means engaging said end portions of said pivotal pins for supporting the same for sliding movement along a shutter plane.
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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) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |