Trim hold down box apparatus

Details Trim hold down box apparatus Trim hold down box apparatus

2005-01-11

2005-01-11

Chin, Peter (Department: 1731)

Paper making and fiber liberation

Apparatus

Running or indefinite length product forming and/or treating...

C162S286000, C162S194000, C083S053000, C083S056000, C083S156000

Reexamination Certificate

active

06841043

ABSTRACT:
A trim hold down box apparatus is disclosed for assisting in the separation of trim cut from an edge of a sheet by a cutter prior to the sheet being transferred from a forming wire of a forming section to a press section of a paper making machine. The apparatus includes a frame which is adjustably secured to the former and is disposed downstream relative to the cutter. A box cradle is secured to the frame and a trim box is movably connected to the box cradle such that floating of the trim box with the forming wire is permitted. The arrangement is such that the forming wire is disposed between the trim and the trim box. A biasing arrangement extends between the trim box and the box cradle so that biasing of the trim box relative to the forming wire is permitted. The trim box has a first and a second end and the first end of the trim box is connected to a source of partial vacuum. The second end of the trim box cooperates with the forming wire and is disposed in a vicinity of the trim. The arrangement is such that when the first end of the trim box is connected to the source of partial vacuum, separation of the trim from the sheet being transferred into the press section is assisted by the partial vacuum applied to the trim at the second end of the trim box.

REFERENCES:
patent: 4175460 (1979-11-01), McPhail
patent: 4512226 (1985-04-01), Juckett
patent: 5140880 (1992-08-01), Littleton
patent: 5423947 (1995-06-01), Steiner
patent: 5622601 (1997-04-01), Adams et al.
patent: 6022452 (2000-02-01), Caspar
patent: 6253983 (2001-07-01), Dadd
patent: 6387220 (2002-05-01), Mohrsen et al.
patent: 6482294 (2002-11-01), Meschenmoser
patent: 6494992 (2002-12-01), Mohrsen et al.

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