Cutting – Cutting motion of tool has component in direction of moving... – Orbital motion of cutting blade
Patent
1989-08-30
1990-05-01
Yost, Frank T.
Cutting
Cutting motion of tool has component in direction of moving...
Orbital motion of cutting blade
83663, 83698, 83699, B26D 162
Patent
active
049208438
ABSTRACT:
The present invention relates to a device for retaining knife blades for cutting, perforation or other treatment of a running web, preferably a paper web, whereby the web (4) runs between a rotatable knife retaining cylinder (3) and a rotatable counter pressure cylinder (5) and whereby the knife blade (2) and a retaining ruler (7) for retaining the blade (2) are provided in a slot (6) in the knife retaining cylinder (3). In order to reduce the time for mounting the knife blades, the retaining ruler (7) has a relative to the slot (6) downwardly inclined wedge surface (10), through which the ruler (7) cooperates with a corresponding downwardly inclined wedge surface (11) on a tightening ruler (9) disposed beside the retaining ruler in the slot (6), and the knife blade (2) is provided, during an adjustment manoeuvre at which the knife retaining cylinder (3) is rotated relative to the counter pressure cylinder (5), to be pressed downwards into the slot (6 ) by the counter pressure cylinder (5), whereby the blade (2) through a support portion (12) on the retaining ruler (7) displaces the ruler (7) downwards relative to the tightening ruler (9) for wedging up the rulers (7, 9) and the blade (2) in the slot (6).
REFERENCES:
patent: 2682306 (1954-06-01), Schriber
patent: 3251256 (1966-05-01), McGrath
patent: 3769868 (1973-11-01), Hornung
patent: 3865164 (1975-02-01), Sybertz
patent: 4392402 (1983-07-01), Rann
patent: 4848202 (1989-07-01), Crampton
Larsson Rolf A.
Stromberg Sven A. R.
Smith Scott A.
Yost Frank T.
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