Cutting – With means to monitor and control operation – Including means to monitor product
Patent
1989-09-07
1991-07-23
Eley, Timothy V.
Cutting
With means to monitor and control operation
Including means to monitor product
83272, 226138, B65H 1722
Patent
active
050333429
ABSTRACT:
A roll type stock feed apparatus having a servomotor drive and a programmable controller operable to drive the feed rolls to feed stock in preselected incremental lengths. A ram position sensor is arranged to be actuated when the ram moves in a downstroke and to be deactuated when the ram moves in an upstroke and the programmable controller is operated in response to the sensor to drive the feed rolls when the sensor is deactuated. The interval between successive actuations of the ram position sensor is timed to measure press speed. The interval between actuation and deactuation of the ram position sensor is also timed to control shifting of one feed roll into feeding engagement with the stock when the ram is at a preselected position intermediate the ram positions at which the sensor is actuated and deactuated. The upper feed roll is shifted into and out of feed position by a double acting piston, and air under regulated pressure is supplied to the upper side of the piston to bias the feed roll downwardly and air under pressure is selectively supplied and exhausted from the underside of the piston to effect shifting of the upper feed roll out of and into feeding engagement with the stock.
REFERENCES:
patent: 3038645 (1962-06-01), Nordlof
patent: 3707255 (1972-12-01), Ridgway et al.
patent: 4078416 (1978-03-01), Voorhees et al.
patent: 4788908 (1988-12-01), Sugiyama
Eley Timothy V.
Pillote Vernon J.
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