Process and apparatus for creasing folded edges of paper product

Details Process and apparatus for creasing folded edges of paper product Process and apparatus for creasing folded edges of paper product

1994-03-08

1996-05-28

Lavinder, Jack W.

Manufacturing container or tube from paper; or other manufacturi

Bending

Folding

493435, 493442, B31B 126

Patent

active

055206042

ABSTRACT:
The folded edges (F) of paper products (P), such as newspapers and magazines, are creased in accordance with the process of the invention, in that at least one pair of creasing tools (W. 1, W.2) act at a creasing point from either side against the folded edge and the creasing point is moved along the folded edge (F) by a relative movement between the product (P) and at least one of the creasing tools. The facing creasing surfaces of the creasing tools (W.1, W.2) are advantageously designed and arranged in such a way that the folded edge is curved at the creasing point, which is achieved in that a perpendicular on the creasing surfaces forms an acute angle at the creasing point with the movement direction (B) of the latter. The creasing tools can also be pressed against one another with a pressing force. During the creasing process the product must be held by holding means. The latter simultaneously serve as conveying means, e.g. as grippers on a gripping chain, which continuously convey the products over a conveying path. With each conveying means is associated at least one pair of creasing tools, which moves over at least part of the conveying path in addition to its movement along the folded edge and substantially synchronously with the conveying means.

REFERENCES:
patent: 3572689 (1968-07-01), Murphy
patent: 3580562 (1969-01-01), Reist
patent: 3931963 (1976-01-01), Bewersdorf
patent: 3955667 (1976-04-01), Muller
patent: 4197045 (1980-04-01), Stauber
patent: 4641575 (1987-02-01), Cavagna
patent: 4795418 (1989-01-01), Reist
patent: 4834696 (1989-05-01), Marsche

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