Patent US3894458A successfully refreshed from Google Patents.
US3894458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Strip perforating apparatus
Assignee: Individual
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Filing: 1974-04-04
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Granted: 1975-07-15
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Expires: 1994-04-04
Abstract
Abstract An apparatus for continuously perforating strip material, i.e. for applying the sprocket perforations along the edge of a film strip. To achieve uniform spacing of these perforations, a work station is established in relation to a rotating circumferential arrangement of punch or perforating devices wherein each punch, in turn, is projected through the strip to cause said perforation. Said punch is held in its projected position through the strip during its subsequent rotative traverse, thereby pulling a selected length of the strip through the work station and locating accurately the next point on the strip where the next perforation is to be made.
Inventors
- 👤 Domenic Borello
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:35
CPC Classifications
B; B26; B26F; B26F1/00; B26F1/0007; B26F1/02; B26F1/06; B26F1/08; Y; Y10; Y10T; Y10T83/00; Y10T83/465; Y10T83/4766; Y10T83/4769; Y10T83/4795; Y10T83/4812
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
204 words
A strip perforating apparatus comprising a motor operated conicAlly shaped rotor, an overhanging housing on said rotor bounding a cylindrical punch compartment in surrounding relation about said rotor, plural punch devices circumferentially arranged about said housing and means for mounting each for movement through a punch stroke from a ready position into said punch compartment to a projected position, a cooperating spring for each punch device which normally holds the same in said ready position, a first encountered rotatably mounted cylindrically shaped cam strategically located in the path of rotative movement of said punch devices effective to urge each punch in turn through said punching stroke, means for positioning a length portion of an elongated strip in said punch compartment so as to be perforated by each said punch during its movement into said projected position, and a second encountered rotatably mounted cam adjacent said first cam effective to hold each punch in turn in said projected position in which it extends through a perforation in said strip during rotative movement from said first cam and until past said second cam, whereby each punch in turn causes a perforation in said strip and also pulls the same in feed movement through said punch compartment.
Claim 2
Dependent Claim
204 words
A strip perforating apparatus comprising a motor operated conicAlly shaped rotor, an overhanging housing on said rotor bounding a cylindrical punch compartment in surrounding relation about said rotor, plural punch devices circumferentially arranged about said housing and means for mounting each for movement through a punch stroke from a ready position into said punch compartment to a projected position, a cooperating spring for each punch device which normally holds the same in said ready position, a first encountered rotatably mounted cylindrically shaped cam strategically located in the path of rotative movement of said punch devices effective to urge each punch in turn through said punching stroke, means for positioning a length portion of an elongated strip in said punch compartment so as to be perforated by each said punch during its movement into said projected position, and a second encountered rotatably mounted cam adjacent said first cam effective to hold each punch in turn in said projected position in which it extends through a perforation in said strip during rotative movement from said first cam and until past said second cam, whereby each punch in turn causes a perforation in said strip and also pulls the same in feed movement through said punch compartment.
References Cited (Backward Citations)
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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) | 1978-07-14 | 1979-01-13 | 1979-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-14 | 1983-01-13 | 1983-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-14 | 1987-01-13 | 1987-07-15 | $7700.00 | Window Closed / Lapsed |