Patent US4403336A successfully refreshed from Google Patents.
Patent US3612673A successfully refreshed from Google Patents.
US3612673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Film advance mechanism
Assignee: AUDISCAN Inc
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Filing: 1970-01-09
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Granted: 1971-10-12
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Expires: 1990-01-09
Abstract
Abstract A film advance mechanism of two sections. The two sections are provided with two adjacent inner surfaces that guidingly advance film frame by frame, gate the film during advancement and mask the images for projection.. Cooperating teeth are provided on the inner surfaces to engage the film sprocket holes of the film for advancing the film. The teeth extend into notches formed in the inner surfaces of the opposite sections.
Inventors
- 👤 Ivars M Skuja
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:26
CPC Classifications
G; G03; G03B; G03B1/00; G03B1/18; G03B1/20; G03B1/22; G03B1/56
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
155 words
A film advance assembly for multiframe film which comprises a longitudinally movable first means having an aperture therein, and a second means having an aperture therein, the first and second means having cooperating adjacent sides adapted to contain a section of multiframe film therebetween and to advance the film when the first means is movable longitudinally and wherein the cooperating adjacent sides of said first and second means are each provided with cooperable film-sprocket-hole-engaging teeth and grooves adapted to receive teeth of the other side; said teeth and grooves being so arranged that film is carried by said first means when said first means is moved so as to transfer the first means aperture out of alignment with the second means aperture, and being so arranged that film is retained by said second means when said first means is moved so as to transfer the first means aperture into alignment with the second means aperture.
Claim 2
Dependent Claim
155 words
A film advance assembly for multiframe film which comprises a longitudinally movable first means having an aperture therein, and a second means having an aperture therein, the first and second means having cooperating adjacent sides adapted to contain a section of multiframe film therebetween and to advance the film when the first means is movable longitudinally and wherein the cooperating adjacent sides of said first and second means are each provided with cooperable film-sprocket-hole-engaging teeth and grooves adapted to receive teeth of the other side; said teeth and grooves being so arranged that film is carried by said first means when said first means is moved so as to transfer the first means aperture out of alignment with the second means aperture, and being so arranged that film is retained by said second means when said first means is moved so as to transfer the first means aperture into alignment with the second means aperture.
Claim 3
Dependent Claim
109 words
The assembly of claim 1 wherein each tooth is provided with a leading edge oriented in the direction of film advance and having a positive rake angle, and a trailing edge having a negative rake angle; and wherein the grooves are so designed that the trailing edges of the teeth, that are withdrawn from film sprocket holes during movement of said first means, contact the sides of grooves in the opposing side to effect relative movement of such side transversely away from the aperture of the other means whereby the film is not engaged around said aperture by said cooperating adjacent sides during longitudinal movement of said first means.
Claim 4
Dependent Claim
30 words
The assembly of claim 1 wherein each tooth is provided with a relatively steeply inclined outer side edge, a relatively less steeply inclined inner side edge, and a flattened tip.
Claim 5
Dependent Claim
49 words
The assembly of claim 1 wherein said first and second means each comprise a gate member provided with parallel, film-contacting side rails in and on which said grooves and teeth are provided; and comprise parallel film-contacting crossrails which, with intermediate sections of the side rails, define the respective apertures.
Claim 6
Dependent Claim
72 words
The assembly of claim 4 wherein a set of two teeth on one member flank one edge of its aperture and a set of two teeth on the other member flank the opposite edge of its aperture such that a film frame may be retained by the two sets of teeth and confined on both sides by said crossrails and intermediate sections of said side rails when the two apertures are aligned.
Claim 7
Dependent Claim
162 words
A film advance assembly for multiframe film which comprises a longitudinally movable first gate member having a pair of parallel side rails provided on one side thereof, an aperture positioned between the side rails, at least one tooth protruding from each side rail, and at least two grooves provided in each rail; and a second gate member having a pair of parallel side rails provided on one side thereof, an aperture positioned between the side rails, at least one tooth protruding from each side rail, and at least two grooves provided in each rail; the teeth and grooves on and in each side rail being so positioned that when the rails on each gate member are juxtapositioned in face-to-face adjacency, the teeth of each gate member interfit into grooves of the other gate member when the two apertures are aligned and interfit into other grooves of the other gate member when the two apertures are out of alignment by one film frame.
Claim 8
Dependent Claim
162 words
A film advance assembly for multiframe film which comprises a longitudinally movable first gate member having a pair of parallel side rails provided on one side thereof, an aperture positioned between the side rails, at least one tooth protruding from each side rail, and at least two grooves provided in each rail; and a second gate member having a pair of parallel side rails provided on one side thereof, an aperture positioned between the side rails, at least one tooth protruding from each side rail, and at least two grooves provided in each rail; the teeth and grooves on and in each side rail being so positioned that when the rails on each gate member are juxtapositioned in face-to-face adjacency, the teeth of each gate member interfit into grooves of the other gate member when the two apertures are aligned and interfit into other grooves of the other gate member when the two apertures are out of alignment by one film frame.
Claim 9
Dependent Claim
88 words
The assembly of claim 6 wherein each tooth is provided with a leading edge oriented in the direction of film advance and having a positive rake angle, and a trailing edge having a negative rake angle; and wherein the grooves are so designed that the trailing edges of the teeth, that are withdrawn from film sprocket holes during movemEnt of said first means, contact the sides of grooves in the opposing side to effect relative movement of such side transversely away from the aperture of the other means.
Claim 10
Dependent Claim
30 words
The assembly of claim 6 wherein each tooth is provided with a relatively steeply inclined outer side edge, a relatively less steeply inclined inner side edge, and a flattened tip.
Claim 11
Dependent Claim
48 words
The assembly of claim 6 wherein two parallel film-contacting crossrails are provided between the side rails of each gate member which, with intermediate sections of the side rails, define the respective apertures and wherein said film-contacting crossrails are separated each time said first gate member is moved longitudinally.
Claim 12
Dependent Claim
72 words
The assembly of claim 9 wherein a set of two teeth on one member flank one edge of its aperture and a set of two teeth on the other member flank the opposite edge of its aperture such that a film frame may be retained by the two sets of teeth and confined on both sides by said crossrails and intermediate sections of said side rails when the two apertures are aligned.
Claim 13
Dependent Claim
73 words
A film advance assembly for multiframe film which comprises first means having an aperture therein, and a second means having an aperture therein, the first and second means having cooperating adjacent confronting sides to engage the film for containing and guiding a section of multiframe film therebetween and means provided on said first means for advancing the film when the first means is moved lengthwise of the film relative to the second means.
Claim 14
Dependent Claim
73 words
A film advance assembly for multiframe film which comprises first means having an aperture therein, and a second means having an aperture therein, the first and second means having cooperating adjacent confronting sides to engage the film for containing and guiding a section of multiframe film therebetween and means provided on said first means for advancing the film when the first means is moved lengthwise of the film relative to the second means.
Claim 15
Dependent Claim
42 words
The film advance assembly defined by claim 11 wherein said apertures in said first and second means are aligned in one operative position of said first and second means and are moved out of alignment when the first means is moved longitudinally.
Claim 16
Dependent Claim
120 words
A film advance assembly for multiframe film having a plurality of spaced driving holes comprising first means for engagement within a driving hole of said film for moving said film in a predetermined direction, second means for engagement with a driving hole of said film for holding said film against movement in the opposite direction; first and second confining surfaces integrally formed adjacent said respective first and second driving hole engagement means for engaging opposite sides of the film therebetween; and means for withdrawing said second means from the driving hole and moving said second means along the film holding the film against said first confining surface when said first means is drivingly engaging a driving hole of said film.
Claim 17
Dependent Claim
120 words
A film advance assembly for multiframe film having a plurality of spaced driving holes comprising first means for engagement within a driving hole of said film for moving said film in a predetermined direction, second means for engagement with a driving hole of said film for holding said film against movement in the opposite direction; first and second confining surfaces integrally formed adjacent said respective first and second driving hole engagement means for engaging opposite sides of the film therebetween; and means for withdrawing said second means from the driving hole and moving said second means along the film holding the film against said first confining surface when said first means is drivingly engaging a driving hole of said film.
Claim 18
Dependent Claim
113 words
A film advance assembly for multiframe film having a plurality of spaced driving holes comprising first means for engagement within a driving hole of said film and for moving said film in a predetermined direction, second means for engagement within a driving hole of said film for holding said film against movement in the opposite direction; and means for withdrawing said second means when said first means is drivingly engaging said film, and wherein said first and second means project through said driving holes from opposite directions and are spring biased toward one another, said withdrawing means including means on said first means for moving said second means away from said first means.
Claim 19
Dependent Claim
113 words
A film advance assembly for multiframe film having a plurality of spaced driving holes comprising first means for engagement within a driving hole of said film and for moving said film in a predetermined direction, second means for engagement within a driving hole of said film for holding said film against movement in the opposite direction; and means for withdrawing said second means when said first means is drivingly engaging said film, and wherein said first and second means project through said driving holes from opposite directions and are spring biased toward one another, said withdrawing means including means on said first means for moving said second means away from said first means.
Claim 20
Dependent Claim
44 words
The film advance assembly of claim 13 wherein said first and second confining surfaces include grooves operable to be engaged by said first means to urge said second means out of said driving holes as said first means is moved in said predetermined direction.
Claim 21
Dependent Claim
99 words
A film advance assembly for multiframe film comprising first means, said first means being movable relative to said second means lengthwise of the film, the first and second means having cooperating confronting sides in face-to-face adjacency for contacting the film and for confining and guiding the film, and means carried by said first means adjacent said confronting side of said first means and movable with said confronting side of said first means for advancing the film when said first means and its confronting siDe are moved lengthwise of the film relative to said second means and its confronting side.
Claim 22
Dependent Claim
99 words
A film advance assembly for multiframe film comprising first means, said first means being movable relative to said second means lengthwise of the film, the first and second means having cooperating confronting sides in face-to-face adjacency for contacting the film and for confining and guiding the film, and means carried by said first means adjacent said confronting side of said first means and movable with said confronting side of said first means for advancing the film when said first means and its confronting siDe are moved lengthwise of the film relative to said second means and its confronting side.
Claim 23
Dependent Claim
68 words
The film advance assembly of claim 16 said film having sprocket holes, said first means being mounted for rocking movement by said film toward and away from said second means, and said advancing means including at least two longitudinally spaced film-sprocket-hole-engaging teeth whereby rocking movement of said first means by said film provides at least one of said teeth in engagement with a sprocket hole in said film.
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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) | 1974-10-11 | 1975-04-12 | 1975-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-11 | 1979-04-12 | 1979-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-11 | 1983-04-12 | 1983-10-12 | $7700.00 | Window Closed / Lapsed |