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EP0329172A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Web perforating apparatus

Assignee: Fujifilm Holdings Corp
•
Filing: 1989-02-17
•
Granted: —
•
Expires: 2009-02-17
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Abstract

Abstract A web perforating apparatus for making holes (11A) through a web (11) along its longitudinal direction comprises a die set (10) composed of a die (30) having die cavities (53) and punches (35), which die and punches are connected together so that they are brought to positions close to but spaced apart from each other through guide members (38) extending in the direction normal to the surface of the web. The die set (10) is provided with a stripper (40) between the die and the punches. The stripper (40) is held so that it is moveable in the direction parallel to the guide members and holds the web (11) when the punches are pulled out of the die cavities. The stripper is provided with punch guide through holes (44), through which the punches are inserted and which each have a size adapted for a very close tolerance fit with each punch.

Inventors

  • 👤 Sanpei C/O Fuji Photo Film Co. Ltd. Iida
  • 👤 Osamu C/O Fuji Photo Film Co. Ltd. Suzuki
  • 👤 Shigehisa C/O Fuji Photo Film Co. Ltd. Shimizu

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-09 14:56
CPC Classifications
B; B26; B26F; B26F1/00; B26F1/0007; B26D; B26D7/00; B26D7/18; B26F1/02

Claims Analysis

Total Claims: 3
Claim 1
Independent Claim 199 words
A web perforating apparatus in which a web is moved intermittently in its longitudinal direction, a die having die cavities is provided on one surface side of the web, and punches are inserted into the die cavities from the other surface side of the web while the web is stopped, thereby making holes in the web so that the holes stand in rows in the longitudinal direction of the web wherein the improvement comprises: i) providing a die set comprising said die and said punches which die and punches are connected together so that they are brought to positions close to and spaced apart from each other through guide members extending in the direction normal to the surface of said web, ii) providing said die set with a stripper between said die and said punches, which stripper is held so that it is moveable in a direction parallel to said guide members and holds said web when said punches are pulled out of said die cavities, and iii) providing said stripper with punch guide through holes, through which said punches are inserted and which each have a size adapted to correspond to the size of each of said punches.
Claim 2
Dependent Claim 199 words
A web perforating apparatus in which a web is moved intermittently in its longitudinal direction, a die having die cavities is provided on one surface side of the web, and punches are inserted into the die cavities from the other surface side of the web while the web is stopped, thereby making holes in the web so that the holes stand in rows in the longitudinal direction of the web wherein the improvement comprises: i) providing a die set comprising said die and said punches which die and punches are connected together so that they are brought to positions close to and spaced apart from each other through guide members extending in the direction normal to the surface of said web, ii) providing said die set with a stripper between said die and said punches, which stripper is held so that it is moveable in a direction parallel to said guide members and holds said web when said punches are pulled out of said die cavities, and iii) providing said stripper with punch guide through holes, through which said punches are inserted and which each have a size adapted to correspond to the size of each of said punches.
Claim 3
Dependent Claim 88 words
An apparatus as defined in Claim 1 wherein said die set is provided with pilot pins which enter holes already made through said web and adjust the position of said web, said pilot pins being slightly longer than said punches and positioned behind said punches, as viewed in the direction of movement of said web, and said stripper is provided with guide through holes, through which said pilot pins are inserted and which each have a size adapted for a close tolerance fit with each said pilot pin.

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