Cutting – With means to monitor and control operation – Including means to correct the sensed operation
Patent
1985-03-28
1986-06-03
Schran, Donald R.
Cutting
With means to monitor and control operation
Including means to correct the sensed operation
83175, 83187, 83925EB, B26D 124
Patent
active
045922608
ABSTRACT:
The frame of the band cutting machine comprises an arm cross consisting of four arms. Each arm supports a fabric feeding roller which is movable back and forth of the arm. The movement of the rollers is carried out by means of threaded spindles extending each through a threaded block supporting a feeding roller. The spindles are interconnected at the center of their arm cross such that a rotating of one spindle by means of e.g. a handwheel will lead to a rotating of the other spindles and accordingly a simultaneous shifting of the fabric feeding rollers along the arms. The location of the upper edge of the circular knitted fabric being cut is scanned by a photoelectric apparatus. The circular cutting knives are supported for a translatory adjusting movement in direction of their center axis. The raising and lowering of these cutting knives is controlled by the output signals of the photoelectric apparatus. The cutting knives are raised or lowered in accordance with the scanned position of the upper edge of the circular knitted fabric being cut such that a continuous accurate width of the band or bands, respectively, being cut can be maintained throughout the cutting operation. The circular knitted fabric supporting turntable is mounted at the base of the frame and is driven for rotation by a motor. This turntable supports a bracket. The fabric to be cut is threaded through the bracket. This bracket is rotatable in a horizontal plane relative to the supporting turntable through a limited angle. The angular position of this bracket relative to the turntable, which angular position is determined by the fabric moving therethrough, is scanned.
REFERENCES:
patent: 3581614 (1971-06-01), Catallo
patent: 3776077 (1973-12-01), Letsche
patent: 4413575 (1983-11-01), Gazzarrini
Gabathuler Ferdinand
Nilsson Erik G.
Schran Donald R.
Swegea Maschinen AG
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