Strip cutter

Claim 2

Strip feeding and cutting mechanism comprising a rotatable feed roll, drive means for effecting intermittent rotation of the feed roll predetermined distances with intervals of non-rotation therebetween, means embodied in the drive means for slowing the rate of rotation of the feed roll to a stop as it nears the end of said predetermined distance, a cutter operable to cut the strip during the interval of non-rotation and a detector device situated adjacent the strip in a position to detect indicia thereon as the strip slows to a stop to effect actuation of the cutter.

Claim 3

Strip feeding and cutting mechanism comprising a rotatable feed roll, drive means for effecting intermittent rotation of the feed roll predetermined distances with intervals of non-rotation therebetween, means embodied in the drive means for slowing the rate of rotation of the feed roll to a stop as it nears the end of said predetermined distance, a cutter operable to cut the strip during the interval of non-rotation and a detector device situated adjacent the strip in a position to detect indicia thereon as the strip slows to a stop to effect actuation of the cutter.

Claim 4

Strip feeding and cutting mechanism comprising a rotatable feed roll, drive means for effecting intermittent rotation of the feed roll predetermined distances with intervals of non-rotation therebetween, means embodied in the drive means for slowing the rate of rotation of the feed roll to a stop as it nears the end of said predetermined distance, a cutter operable to cut the strip during the interval of non-rotation and a detector device situated adjacent the strip in a position to detect indicia thereon as the strip slows to a stop to effect actuation of the cutter.

Claim 5

Apparatus according to claim 1, wherein said detector device comprises a lamp and cell supported adjacent an edge of the strip, and means for adjusting the lamp and cell relative to the cutter.

Claim 6

Apparatus according to claim 1, wherein said detector device comprises a lamp and cell supported adjacent an edge of the strip with a lamp at one broad side and the cell at the other broad side, providing a gap through which the edge moves.

Claim 7

Apparatus according to claim 1, comprising a hold-down roll and means supporting the hold-down roll above the feed roll for tangential engagement with a strip resting on the feed roll, said means being operable to lift the hold-down roll away from the feed roll to enable threading the strip.

Claim 8

Apparatus according to claim 1, comprising a hold-down roll, spaced parallel arms rotatably supporting the hold-down roll, and means pivotally supporting the arms for rotation about an axis parallel to the axis of the feed roll, said axis being situated above and forwardly of the axis of the hold-down roll in the direction of movement of the strip.

Claim 9

Apparatus according to clam 5, comprising means for effecting rotation of the arms to lift the hold-doWn roll from the feed roll.

Claim 10

Apparatus according to clam 5, comprising means for effecting rotation of the arms to lift the hold-doWn roll from the feed roll.

Claim 11

Apparatus according to claim 1, wherein said cutter means comprises spaced parallel guide bars, providing a gap of approximately the thickness of the strip through which the strip is advanced by said feed roll, and a cutter bar supported at the forward side of the guide bars, said guide bar having an edge substantially parallel to the plane of the lower edge of the upper cutter bar and movable tangentially by one of the cutter bars relative to said edge.

Claim 12

Apparatus according to claim 1, wherein the cutter means comprises vertically spaced parallel guide bars between which the strip is advanced, and a cutter bar at the far side of the guide bars with respect to the direction of movement of the strip, the lower one of said guide bars having a flat upper surface constituting an anvil against which the cutter bar operates to sever the strip, and a plurality of longitudinally spaced pairs of transversely spaced support rollers preceding the feed roll, said support rollers being supported in tangential relation to a plane containing the flat upper surface of the lower guide bar and tangent to the feed roll, said support rolls having radially extending shoulders providing edge guides for maintaining the course of the strip at right angles to the cutter bar.

Claim 13

Apparatus according to claim 1, wherein the cutter means comprises a bar having a cutting edge comprising a motor and means for operably connecting the motor to the cutter bar to effect its reciprocation, said means comprising a crank on the motor shaft, a crank on the cutter bar shaft and a link connecting the two cranks, a switch adapted to be closed by the detector device operable to start the motor, a cam on the motor shaft and a switch operable by the cam on the motor shaft to stop the motor when the cutter has completed its cutting cycle.

Claim 14

Apparatus according to claim 9, wherein the detector is supported adjacent and edge of the strip substantially abreast the feed roll and there is means for adjusting the detector longitudinally with respect to the strip and means for locking it in a selected position.

Claim 15

Strip feeding and cutting means comprising a rotatable feed roll, drive means for effecting intermittent rotation of the feed roll through predetermined angles of rotation to successively advance and stop the strip with intervals of non-rotation therebetween, said drive means being operable to slow the rate of rotation of the feed roll to a stop as it nears the end of each period of rotation and comprises for this purpose a constant speed motor, a shaft supporting the feed roll for rotation, a clutch on said shaft having fixed and movable parts adapted to be engaged and disengaged to effect by engagement rotation of the feed roll in a direction to advance the strip and by disengagement to permit the movable part to be rotated in a reverse direction to the fixed part, linkage drivably connecting the motor to the movable part of the clutch to effect reciprocation thereof, electrically operable means for engaging and disengaging the clutch, a cam on the motor shaft operable to actuate the switch to engage the clutch and disengage the clutch in consonance with the reciprocation of the movable part of the clutch, a cutter, means for effecting operation of the cutter, and a detector situated near the place of slow-down of the strip operable by indicia on the strip to initiate operation of the cutter.

Claim 16

Strip feeding and cutting means comprising a rotatable feed roll, drive means for effecting intermittent rotation of the feed roll through predetermined angles of rotation to successively advance and stop the strip with intervals of non-rotation therebetween, said drive means being operable to slow the rate of rotation of the feed roll to a stop as it nears the end of each period of rotation and comprises for this purpose a constant speed motor, a shaft supporting the feed roll for rotation, a clutch on said shaft having fixed and movable parts adapted to be engaged and disengaged to effect by engagement rotation of the feed roll in a direction to advance the strip and by disengagement to permit the movable part to be rotated in a reverse direction to the fixed part, linkage drivably connecting the motor to the movable part of the clutch to effect reciprocation thereof, electrically operable means for engaging and disengaging the clutch, a cam on the motor shaft operable to actuate the switch to engage the clutch and disengage the clutch in consonance with the reciprocation of the movable part of the clutch, a cutter, means for effecting operation of the cutter, and a detector situated near the place of slow-down of the strip operable by indicia on the strip to initiate operation of the cutter.

Claim 17

Apparatus according to claim 11, comprising an electrically operable brake on the shaft of the feed roll, a switch for effecting operation of the brake and a cam on the motor shaft for effecting operation of the switch, said cam being located with respect to the cam which actuates the clutch to apply a brake simultaneously with disengagement of the clutch and release the brake simultaneously with engagement of the clutch.