Resilient finger scrap stripper for corrugated board rotary cutting die
First Claim
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1. A method of cutting and stripping a piece of scrap from a sheet of corrugated board passing between a rotary cutting die and an anvil where the rotary cutting die is rotated in one direction, comprising:
- directing the sheet of corrugated board through a nip area defined between the rotary cutting die and the anvil;
cutting the piece of scrap from the corrugated board with a scrap cutting blade as the corrugated board passes through the nip;
engaging the cut piece of scrap with a scrap ejector secured to the rotary cutting die and comprising an elongated piece of resilient and compressible material that includes a base and a series of spaced apart forwardly angled fingers projecting from the base where each finger includes a leading end and a trailing end;
positioning the scrap stripper on the cutting die such that the fingers and the leading ends of the fingers are angled forwardly from the cutting die in the direction of rotation of the rotary cutting die such that in a disengaged position the fingers and the leading ends thereof are angled forwardly in the direction of the rotation of the rotary cutting die;
engaging the forwardly angled leading ends of the fingers with the cut piece of scrap and causing the forwardly angled fingers to bend back and project in a direction away from the direction of rotation of the rotary cutting die resulting in the fingers being compressed in the nip and resulting in the piece of scrap being held between the leading end of the fingers and the anvil; and
as the rotary cutting die and anvil rotate and the cut piece of scrap emerges from the nip, releasing the bent back fingers allowing the fingers to spring forwardly to a forwardly angled position relative to the rotary cutting die and in the process stripping the piece of scrap from the scrap cutting blade and directing the piece of scrap away from the nip and away from the rotary cutting die and anvil.
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Accused Products
Abstract
An apparatus configured to cooperate with a rotating anvil to cut corrugated board comprises a rotary cutting die configured to rotate in one direction and to cooperate with the anvil to cut corrugated board. The cutting die includes a base and at least one scrap cutting blade and a scrap stripper that comprises one or more fingers that project from the base at an incline and which is slanted forwardly in the direction of rotation of the cutting die for stripping cut scrap pieces of corrugated board from the blade.
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Citations
9 Claims
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1. A method of cutting and stripping a piece of scrap from a sheet of corrugated board passing between a rotary cutting die and an anvil where the rotary cutting die is rotated in one direction, comprising:
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directing the sheet of corrugated board through a nip area defined between the rotary cutting die and the anvil; cutting the piece of scrap from the corrugated board with a scrap cutting blade as the corrugated board passes through the nip; engaging the cut piece of scrap with a scrap ejector secured to the rotary cutting die and comprising an elongated piece of resilient and compressible material that includes a base and a series of spaced apart forwardly angled fingers projecting from the base where each finger includes a leading end and a trailing end; positioning the scrap stripper on the cutting die such that the fingers and the leading ends of the fingers are angled forwardly from the cutting die in the direction of rotation of the rotary cutting die such that in a disengaged position the fingers and the leading ends thereof are angled forwardly in the direction of the rotation of the rotary cutting die; engaging the forwardly angled leading ends of the fingers with the cut piece of scrap and causing the forwardly angled fingers to bend back and project in a direction away from the direction of rotation of the rotary cutting die resulting in the fingers being compressed in the nip and resulting in the piece of scrap being held between the leading end of the fingers and the anvil; and as the rotary cutting die and anvil rotate and the cut piece of scrap emerges from the nip, releasing the bent back fingers allowing the fingers to spring forwardly to a forwardly angled position relative to the rotary cutting die and in the process stripping the piece of scrap from the scrap cutting blade and directing the piece of scrap away from the nip and away from the rotary cutting die and anvil. - View Dependent Claims (2, 3, 4, 5)
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6. An apparatus configured to cooperate with a rotating anvil to cut corrugated board comprising:
- a rotary cutting die including a rotating curved die board rotateable in one direction and configured to cooperate with the anvil to cut corrugated board passing through a nip defined between the die board and the anvil;
the die board having at least one scrap cutting blade mounted thereon for cutting a piece of scrap from the corrugated board that is directed through the nip;
a scrap stripper mounted to the die board adjacent the scrap cutting blade for stripping the piece of scrap from the scrap cutting blade and for urging the piece of scrap against the anvil as the piece of scrap exits the nip;
the scrap stripper including a base and one or more forwardly angled fingers with each finger including a leading end and a trailing end and constructed of resilient and compressible material;
each finger and the leading end of each finger in a disengaged position being angled forwardly relative to the die board and the direction of rotation of the die board;
wherein as each forwardly angled finger enters the nip, the leading end of each finger engages the piece of scrap and presses the piece of scrap against the anvil such that the piece of scrap is sandwiched between the leading end of each finger and the anvil; and
wherein as each finger exits the nip, the finger becomes disengaged with the piece of scrap and returns to the disengaged position with the finger and leading end of the finger being angled forwardly relative to the die board and the direction of rotation of the die board. - View Dependent Claims (7, 8, 9)
- a rotary cutting die including a rotating curved die board rotateable in one direction and configured to cooperate with the anvil to cut corrugated board passing through a nip defined between the die board and the anvil;
Specification