High speed interfolder

Manufacturing container or tube from paper; or other manufacturi – Bending – Folding

Reexamination Certificate

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Details

C493S359000, C493S430000, C493S433000, C270S039010, C270S040000, C270S039050

Reexamination Certificate

active

07452321

ABSTRACT:
An interfolding apparatus including a knife roll rotatable about an axis and operable to cut successive sheets from a stream of web material issuing from a source in a downstream direction. A folding roll is positioned downstream of the knife roll and is rotatable in a first direction at a first roll speed. An additional roll is disposed adjacent to the folding roll and is rotatable about an axis in a second direction at a second roll speed. The additional roll is operable to receive the successive sheets and release the successive sheets in the downstream direction toward the folding roll. The folding roll and the additional roll define a nip therebetween, the successive sheets passing through the nip. The first roll speed of the folding roll is different from the second roll speed of the additional roll, the difference in speed between the folding roll and the additional roll operable to overlap adjacent portions of the successive sheets onto the folding roll.

REFERENCES:
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patent: 5980444 (1999-11-01), Dickhoff
patent: 6090467 (2000-07-01), Yip
patent: 7121994 (2006-10-01), Haasl
patent: 2005/0073090 (2005-04-01), White
patent: 1 520 822 (2005-06-01), None
patent: 57160865 (1982-10-01), None

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