US3765583A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ancing mechanism for precisely positioning a perforated web
Assignee: Eastman Kodak Co
•
Filing: 1972-01-01
•
Granted: 1973-10-16
•
Expires: 1992-01-01
Abstract
Abstract A film advancing mechanism for advancing a film containing perforations to a precise final position at an operating station, such as a splicing station. The film is initially transported by a suitable transport mechanism to an initial position in which it is located approximately .010 to .40 inches short of the precise final position. The film advancing mechanism advances the film from the initial position to within substantially plus or minus .005 inch of the final position.
Inventors
- 👤 A Mathes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:23
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/14; G03B21/32; G03B21/43; G03B21/44; G03B21/46; G03B35/00; G03B35/18; G03B35/24
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
197 words
In a mechanism for advancing the end portion of a web of the type containing equidistantly-spaced perforations to a precise final position, the combination comprising: web transport means for transporting the web to an initial position short of the final position; web advancing means for advancing the web from said initial position to said final position, said web advancing means comprising an arm having a depending finger, a rotary solenoid coupled to said arm, and cam means having a first cam surface for guiding said finger into guiding engagement with a web perforation, a second cam surface for retaining said finger in engagement with said web perforation as said web is moved by said finger, and a stop surface in the path of said arm for preventing further advance of said finger and web when saiD web end portion reaches said final position; and control means coupled to said web transport and advancing means for operating said web transport and advancing means in timed relation whereby said web transport means transports said web end portion to said initial position, and said web advancing means advances said web end portion from said initial position to said final position.
Claim 2
Dependent Claim
197 words
In a mechanism for advancing the end portion of a web of the type containing equidistantly-spaced perforations to a precise final position, the combination comprising: web transport means for transporting the web to an initial position short of the final position; web advancing means for advancing the web from said initial position to said final position, said web advancing means comprising an arm having a depending finger, a rotary solenoid coupled to said arm, and cam means having a first cam surface for guiding said finger into guiding engagement with a web perforation, a second cam surface for retaining said finger in engagement with said web perforation as said web is moved by said finger, and a stop surface in the path of said arm for preventing further advance of said finger and web when saiD web end portion reaches said final position; and control means coupled to said web transport and advancing means for operating said web transport and advancing means in timed relation whereby said web transport means transports said web end portion to said initial position, and said web advancing means advances said web end portion from said initial position to said final position.
Claim 3
Dependent Claim
40 words
The invention according to claim 1 wherein said web advancing means further comprises damping means for said rotary solenoid for damping the movement of said finger so that the edge of the web perforation is not damaged upon engagement therewith.
Claim 4
Dependent Claim
143 words
In a mechanism for advancing the end portion of a web of the type containing equidistantly-spaced perforations from an initial position to a precise final position, the combination comprising: web advancing means normally out of engagement with a web and reciprocally movable longitudinally of said web; and cam means for controlling said web advancing means and having a first cam surface for guiding said web advancing means into driving engagement with a web perforation, a second cam surface continuous with said first cam surface for retaining said web advancing means into engagement with said web perforation as said web is moved by said transport means, and a stop surface defined by said second cam surface in the path of said web advancing means for preventing further advance of said web advancing means and web when said web end portion reaches said final position.
Claim 5
Dependent Claim
143 words
In a mechanism for advancing the end portion of a web of the type containing equidistantly-spaced perforations from an initial position to a precise final position, the combination comprising: web advancing means normally out of engagement with a web and reciprocally movable longitudinally of said web; and cam means for controlling said web advancing means and having a first cam surface for guiding said web advancing means into driving engagement with a web perforation, a second cam surface continuous with said first cam surface for retaining said web advancing means into engagement with said web perforation as said web is moved by said transport means, and a stop surface defined by said second cam surface in the path of said web advancing means for preventing further advance of said web advancing means and web when said web end portion reaches said final position.
Claim 6
Dependent Claim
18 words
The invention according to claim 3 wherein said web advancing means comprises an arm having a depending finger.
Claim 7
Dependent Claim
26 words
The invention according to claim 3 wherein said web advancing means comprises an arm having a depending finger, and a rotary solenoid coupled to said arm.
Claim 8
Dependent Claim
38 words
The invention according to claim 3, and further including means coupled to said web advancing means for damping the movement of said web advancing means so that the edge of said perforation is not damaged upon engagement therewith.
Claim 9
Dependent Claim
41 words
The invention according to claim 3 wherein said first cam surface is an inclined surface at an angle to said web, said second cam surface is substantially parallel to said web, and said stop surface is substantially perpendicular to said web.
Claim 10
Dependent Claim
58 words
The invention according to claim 3 wherein said web advancing means comprises an arm having a depending finger, a rotary solenoid secured to said arm, and said invention further includes damping means for said rotary solenoid comprising a lever having one portion thereof secured to said rotary solenoid, and a dashpot secured to another portion of said lever.
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) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |