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US 3,942,699 AGranted
Box stitching apparatus
AssigneePrecision Industries, Inc.
InventorStephen Stanton
Life of this patent
Estimating the term…
Abstract
A box stitching machine is disclosed which includes a stitching head and a set of pull rollers for intermittently moving a box to be stitched past the stitching head. An operating motor drives a shaft which is connected to the pull rollers through a clutch brake combination. Logic circuitry is disclosed which is responsive to a pair of photocells for starting and stopping operation of the stitching head; a manual switch for adjusting the desired spacing between stitches applied by the stitching head and a plurality of photocells for finely adjusting the stitch spacing.
Claims2
A stitching machine including:
- first means for (1) applying fastening means at a predetermined rate to a workpiece passing thereby and (2) generating a first control signal at said predetermined rate;
- second means for moving said workpiece along the path past said first means;
- third means for stopping and starting said second means in response to said first and a second control signal applied thereto;
- fourth means responsive to said first control signal and a spacing signal for generating said second control signal;
- said fourth means being a voltage controlled timer;
- said stitching machine also including a summing amplifier for providing said spacing signal;
- means for generating a predetermined signal indicative of said desired spacing;
- means for generating a feedback signal responsive to the actual stitch spacing;
- means for applying said predetermined signal to said summing amplifier;
- and
- means for applying said feedback signal to said summing amplifier.
8 more elements
Dependencies are inferred from the claim text.