Patent US3751144A successfully refreshed from Google Patents.
US3751144A
Expired / Lapsed
US
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Copying cinematographic film
Assignee: Constantin GmbH
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Filing: 1971-06-03
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Granted: 1973-08-07
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Expires: 1991-06-03
Abstract
Abstract A skip-frame film is produced starting with a broad screen negative film exposed in a conventional manner. The negative film is suitable for the production of wide screen copies in a conventional manner. The images occurring one after the other on the negative film are reduced optically without distortion so as to have a height equal to half the conventional four perforation transport step and an image breadth which allows the accommodation of two sound tracks, one along each edge of the film. The images are arranged in two alternating series. The first series are copied in a first copying operation. The following series is copied in a second copying operation with the film images moving in the opposite direction. Intermediate spaces between the individual images are omitted or filled in.
Inventors
- 👤 G Greger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:10
CPC Classifications
G; G03; G03D; G03D15/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
229 words
A method of producing skip-frame film on which there are two alternating series of images, with each series being arranged in a sequence running in a direction opposite the sequence of the other series, and with each series of images having a sound track, comprising the steps of: exposing a strip of negative film with a series of images of a first size; optically reducing each image of the negative film, without distortion of the image, in order that the reduced image occupies a height one-half the height occupied by the unreduced image and to have a breadth which permits reception of sound tracks along the edGes of the film on which the images are copied; copying a first series of the optically reduced images from the negative film onto a receiving film, with the copied images of the first series being of a height such that each occupies half the height of an unreduced image and with the copied images spaced apart the height of a reduced image; copying a second series of the optically reduced images in a sequence moving in the opposite direction from the sequence of the first series onto the spaces between neighboring images of the first series, such that two images, one from each series, have a total height of one unreduced image, and such that intermediate spaces between individual images are omitted.
Claim 2
Independent Claim
229 words
A method of producing skip-frame film on which there are two alternating series of images, with each series being arranged in a sequence running in a direction opposite the sequence of the other series, and with each series of images having a sound track, comprising the steps of: exposing a strip of negative film with a series of images of a first size; optically reducing each image of the negative film, without distortion of the image, in order that the reduced image occupies a height one-half the height occupied by the unreduced image and to have a breadth which permits reception of sound tracks along the edGes of the film on which the images are copied; copying a first series of the optically reduced images from the negative film onto a receiving film, with the copied images of the first series being of a height such that each occupies half the height of an unreduced image and with the copied images spaced apart the height of a reduced image; copying a second series of the optically reduced images in a sequence moving in the opposite direction from the sequence of the first series onto the spaces between neighboring images of the first series, such that two images, one from each series, have a total height of one unreduced image, and such that intermediate spaces between individual images are omitted.
Claim 3
Dependent Claim
68 words
The method of producing skip-frame film of claim 1, comprising the further step of copying two sound tracks, one for each series of images, onto the edges of the receiving film, wherein each sound track is copied at the conventional film movement rate for an unreduced image, whereby the sound track for a respective optically reduced image extends along a film edge a distance for an unreduced image.
Claim 4
Dependent Claim
42 words
The method of producing skip-frame film of claim 2, wherein the reduced height of the image is obtained by reducing the entire size of the image without distorting it and cropping the image to reduce its height dimension to the recited level.
References Cited (Backward Citations)
US1032172A
Cited
US3396021A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |