Patent US1131869A successfully refreshed from Google Patents.
Patent US3752578A successfully refreshed from Google Patents.
US3752578A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microfilm transport and enlarger for making prints and plates
Assignee: Individual
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Filing: 1972-04-27
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Granted: 1973-08-14
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Expires: 1992-04-27
Abstract
Abstract Microfilm is a source for exposure of sensitized paper or plate stock in an electrostatic copier, or other equipment, wherein light exposes light-sensitive material. The device has a base which may be mounted on the copier and a tower above the base carrying a housing. The film transport is motor driven from a supply reel to a take-up reel supported by the housing which has a film support hinged for access to the film for adjustment of the apparatus and to remove film. The transport has a light and photocell control of the winding motor so that marks on the film accurately position a selected frame relative to the optical axis of the lens and different channels or marks may be used selectively for control purposes. The transport and lens are mounted for movement along two horizontal axes and a vertical axis relative to the copier. The head contains an exposure lamp which is also adjustable in position. Vertical movement of the head relative to the tower governs the amount of enlargement of the microfilm frames.
Inventors
- 👤 D Allan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:17
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/32; G03B27/46; G03B27/462; G03B27/326
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
256 words
A film transport and enlarger machine for making prints comprising a horizontally disposed casing having means to support light-sensitive material in horizontal position and formed with a first top opening through which said material is exposed, a base having a second opening, cooperating first means on said base and casing for moving said base parallel to said casing in a first direction, a tower mounted on and extending upward from said base, a housing, second means mounting said housing on said tower, third means for moving said housing relative to said tower in a second direction parallel to said base and transverse to said first direction, fourth means for moving said housing along said tower perpendicular to said base, an exposure light in said housing, an enlarging lens on the bottom of said housing above said second opening, a supply reel mounted on one side of said housing, a takeup reel mounted on the other side of said housing, a motor, a pair of film feed rolls driven by said motor to feed film from said supply reel to said takeup reel, guide means on said housing guiding film from said supply reel through said film rolls to said takeup reel, said guide means beIng between said light and said lens, a rewind drive for said takeup reel driven by said motor, and electrical means adjacent said guide means controlling said motor for accurately locating a selected frame of said film in line with the optical axis of said lens and in line with said light.
Claim 2
Dependent Claim
256 words
A film transport and enlarger machine for making prints comprising a horizontally disposed casing having means to support light-sensitive material in horizontal position and formed with a first top opening through which said material is exposed, a base having a second opening, cooperating first means on said base and casing for moving said base parallel to said casing in a first direction, a tower mounted on and extending upward from said base, a housing, second means mounting said housing on said tower, third means for moving said housing relative to said tower in a second direction parallel to said base and transverse to said first direction, fourth means for moving said housing along said tower perpendicular to said base, an exposure light in said housing, an enlarging lens on the bottom of said housing above said second opening, a supply reel mounted on one side of said housing, a takeup reel mounted on the other side of said housing, a motor, a pair of film feed rolls driven by said motor to feed film from said supply reel to said takeup reel, guide means on said housing guiding film from said supply reel through said film rolls to said takeup reel, said guide means beIng between said light and said lens, a rewind drive for said takeup reel driven by said motor, and electrical means adjacent said guide means controlling said motor for accurately locating a selected frame of said film in line with the optical axis of said lens and in line with said light.
Claim 3
Dependent Claim
39 words
A machine according to claim 1 in which said first means comprises a rack and means mounting said rack on said casing and a pinion rotatable in said base meshing with said rack and means for turning said pinion.
Claim 4
Dependent Claim
51 words
A machine according to claim 1 in which said third means comprises cooperating horizontal slides one fixed on said tower and the other on said housing, a rack fixed to said housing, a pinion rotatable relative to said other slide and meshing with said rack, and means for turning said pinion.
Claim 5
Dependent Claim
27 words
A machine according to claim 1 in which said fourth means comprises cooperating vertical slides, one of said tower, the other fixed for movement with said housing.
Claim 6
Dependent Claim
38 words
A machine according to claim 4 in which said fourth means further comprises a rack fixed to said tower, and a rotatably mounted pinion movable with said housing meshing with said rack and means for turning said pinion.
Claim 7
Dependent Claim
53 words
A machine according to claim 1 in which said housing has a bottom opening and which further comprises a bottom plate on which said lens is mounted, and means pivotally mounting said plate relative to said housing to provide access through said bottom opening to at least a portion of said electrical means.
Claim 8
Dependent Claim
99 words
A machine according to claim 1 which further comprises a gear train for driving said film rolls from said motor, said electrical means including a lamp positioned at the edge of the path of film through said guide means to pass light from said lamp through the edge of film, a photocell, optical means including a reflecting surface establishing a path of light from said lamp through the edge of said film and to said photocell, and electrical components for stopping said motor when channel marks on said film interrupt transmission of light from said lamp to said photocell.
Claim 9
Dependent Claim
62 words
A machine according to claim 7 in which said housing has a bottom opening and which further comprises a bottom plate on which said lens is mounted, means pivotally mounting said plate relative to said housing to provide access through said bottom opening to at least a portion of said electrical means, said lens, said lamp, said photocell and said optical means.
Claim 10
Dependent Claim
64 words
A machine according to claim 7 which further comprises a slide mounted for transverse movement in said housing, an adjustment control for moving said photocell and lamp to different positions relative to the edge of said path of film, said holder mounted on said slide, whereby said photocell senses locating channel marks on said film at different distances from the edge of said film.
Claim 11
Dependent Claim
88 words
A machine according to claim 7 which further comprises a second photocell adjacent said first-mentioned photocell and spaced therefrom in the direction of movement of said film, and electrical means controlled by said second photocell to change the speed of movement of said film drive to slow speed when illumination of said second photocell is interrupted by said locating spot, whereby said second photocell senses said spot and slows film movement and said first-mentioned photocell senses said spot to accurately stop said film relative to said first aperture.
Claim 12
Dependent Claim
40 words
A transport according to claim 10 in which said motor is reversible and which further comprises a pair of one-direction clutches in said gear train, said second photocell reversing said motor and said clutches slowing rotation of said film drive.
References Cited (Backward Citations)
US2131693A
Cited
US2291613A
Cited
US2346490A
Cited
US3537790A
Cited
US3592114A
Cited
US3600089A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |