US3661044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary perforating apparatus
Assignee: Agfa Gevaert NV
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Filing: 1970-05-08
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Granted: 1972-05-09
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Expires: 1990-05-08
Abstract
Abstract A rotary film perforating apparatus for making the edge perforations in photographic film comprising a rotary wheel carrying on its periphery closely spaced individual perforator assemblies. Each perforator assembly comprises a base fitted with a die element and a pivotable perforator arm carrying a punch element and both elements may be readily removed from the assembly. The arm frictionally engages wall portions of the die element to thereby receive exact guidance with respect to the die. The material hardness of the arm is greater than that of the die so that the arm does not wear out and the replacement of a used die element by a new one entails automatically a renewal of the guidance of the perforator arm.
Inventors
- 👤 Emanuel Hubert Duden
- 👤 Joseph Marie Cappuyns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:32
CPC Classifications
B; B26; B26F; B26F1/00; B26F1/02; B26F1/06; B26F1/08; B26F1/0007; Y; Y10; Y10T; Y10T83/00; Y10T83/202; Y10T83/2066; Y10T83/207; Y10T83/2092; Y10T83/2183; Y10T83/2185; Y10T83/465; Y10T83/4766; Y10T83/4769; Y10T83/4795; Y10T83/4812; Y10T83/483; Y10T83/4836
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
197 words
A rotary perforating apparatus comprising in combination: a frame; at least one cam member carrying a camming surface fixedly mounted on said frame; a web-supporting wheel rotatably journalled in said frame; a plurality of web perforator assemblies secured to the outside periphery of said web-supporting wheel in fixed circumferentially spaced relation to each other, each web perforator assembly comprising a base member, at least one operator arm movable relative to said base member a replaceable punch element supported on said arm, and a replaceable cooperating die element secured to the base member, each said operator arm being engaged by the camming surface of each such cam member and being movable thereby to bring the punch element into and away from perforating relationship with the die element, and each die element having at least one wall portion cooperating with the corresponding operator arm or a component fixedly connected thereto to provide exact guidance therefor at least in a direction lateral to the plane of movement of the arm before the associated punch element contacts the web supported on the die element; means for removing the slugs cut out from said web; and means for rotating said web-supporting wheel.
Claim 2
Dependent Claim
197 words
A rotary perforating apparatus comprising in combination: a frame; at least one cam member carrying a camming surface fixedly mounted on said frame; a web-supporting wheel rotatably journalled in said frame; a plurality of web perforator assemblies secured to the outside periphery of said web-supporting wheel in fixed circumferentially spaced relation to each other, each web perforator assembly comprising a base member, at least one operator arm movable relative to said base member a replaceable punch element supported on said arm, and a replaceable cooperating die element secured to the base member, each said operator arm being engaged by the camming surface of each such cam member and being movable thereby to bring the punch element into and away from perforating relationship with the die element, and each die element having at least one wall portion cooperating with the corresponding operator arm or a component fixedly connected thereto to provide exact guidance therefor at least in a direction lateral to the plane of movement of the arm before the associated punch element contacts the web supported on the die element; means for removing the slugs cut out from said web; and means for rotating said web-supporting wheel.
Claim 3
Dependent Claim
48 words
A rotary perforating apparatus according to claim 1 wherein each operator arm is pivotally journalled between upstanding wall portions of the base member with a lateral clearance therebetween which is sufficiently great to accommodate the exact lateral positioning of the arm by such portions of the die element.
Claim 4
Dependent Claim
52 words
A rotary perforating apparatus according to claim 2 wherein each die element has opposed lip portions which extend from the body of the die element towards the pivotal axis of the operator arm and the inner faces of said lip portions cooperate with the corresponding operator arm for effecting said lateral guidance.
Claim 5
Dependent Claim
21 words
A rotary perforating apparatus according to claim 3, wherein said inner faces slidingly engage lateral wall portions of the perforator arm.
Claim 6
Dependent Claim
24 words
A rotary perforating apparatus according to claim 1, wherein spacer plates are provided between the underside of the die elements and the base members.
Claim 7
Dependent Claim
27 words
A rotary perforating apparatus according to claim 1, wherein the punch elements are attached on the operator arms for adjustment in the direction of the punch axis.
Claim 8
Dependent Claim
27 words
A rotary perforating apparatus according to claim 6 wherein the punch elements carry a plurality of punches in symmetrical arrangement at each of the opposite ends thereof.
Claim 9
Dependent Claim
33 words
A rotary perforating apparatus according to claim 2 wherein each base member carries two pivotable operator arms and associated punch elements which cooperate with and receive lateral guidance from a common die element.
Claim 10
Dependent Claim
34 words
A rotary perforating apparatus according to claim 1, wherein the cam member includes a removable sector to enable removal of a perforator assembly in a direction generally radially of the web supporting wheel axis.
Claim 11
Dependent Claim
68 words
A rotary perforating apparatus according to claim 1 including an operator arm support mounted for movement in a direction parallel to the wheel axis, and means mounting said operator arm on said support for movement in a direction radially of the wheel, and wherein two cam members are provided, one controlling the axial position of said support and the other controlling the radial position of the operator arm.
Claim 12
Dependent Claim
49 words
A rotary perforating apparatus according to claim 10 wherein at least one aligning pin is fitted to the operator arm for engaging a corresponding opening in the die element as the punch element is moved to operative position for exactly positioning the punch element relative to the die element.
Claim 13
Dependent Claim
42 words
A rotary perforating apparatus according to claim 11 wherein said at least oNe aligning pin has a tapering free end to facilitate the correct relative positioning of the punch element and die element as the punch element is moved to operating position.
Claim 14
Dependent Claim
44 words
A rotary perforating apparatus according to claim 10, wherein each punch element carries at least two punches which are spaced from each other in the direction of the axis of the film supporting wheel to thereby produce two rows of perforations on the web.
Claim 15
Dependent Claim
41 words
A rotary perforating apparatus according to claim 13, wherein adjustment means is provided for adjusting the position of the cam members to thereby adjust the distance over which the operator arms carrying the punch elements are moved towards the die elements.
Claim 16
Dependent Claim
58 words
A rotary perforating apparatus according to claim 1 wherein cavities are provided in the die elements in the region thereof which is covered by the web and including means for maintaining in these cavities a vacuum for securing the web against displacement relative to the web-supporting wheel at least during the withdrawal of the punches from the perforations.
References Cited (Backward Citations)
US2760576A
Cited
US2963932A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |