Method and apparatus for folding a web having a transverse slit

Details Method and apparatus for folding a web having a transverse slit Method and apparatus for folding a web having a transverse slit

1982-06-25

1984-10-02

Spruill, Robert L.

Manufacturing container or tube from paper; or other manufacturi

With cutting, breaking, tearing, or abrading

Including assembling or disassembling of distinct members

493233, 493439, 226 88, 226168, B41L 4304

Patent

active

044745664

ABSTRACT:
A continuous web of paper has a longitudinally extending marginal part folded over onto an adjacent longitudinally extending second part of the web. The web is in tension, and the second web part has a transverse slit. During the folding step, the marginal part is folded out of the plane of the web thereby increasing the tension on the second web part. A ribbon of flexible material is disposed beneath, and conformed to the contours of, the second web part during the folding step, to absorb some of the tension on the second part so as to prevent transverse tearing from the transverse slit across the second part of the web.

REFERENCES:
patent: 4066251 (1978-01-01), Johnsen
patent: 4304561 (1981-12-01), Shingo
patent: 4337058 (1982-06-01), Lerner
patent: 4420148 (1983-12-01), Meadows

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