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AssigneeIchiro Miyakita
InventorsHiroshi Miyakita, Ichiro Miyakita
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A method and apparatus for cutting a continuously moving sheet material in which a nozzle for directing a jet stream of fluid under high pressure is driven in predetermined directions along a closed track consisting of a pair of straight paths intersecting each other symmetrically at a predetermined angle relative to the cutting direction of the sheet material and a pair of curved paths connecting the associated ends of the straight paths. In the method and apparatus, the moving velocity of the jet nozzle is controlled as a function of the feeding velocity of the sheet material and the desired length of sheets cut from the sheet material, and the energy of the fluid under high pressure directed from the moving jet nozzle toward the sheet material is utilized to cut the sheet material into the sheets of desired length.
A method of cutting a web of sheet material continuously fed at a predetermined velocity into sheets of predetermined length, comprising moving alternately a high-pressure fluid jet nozzle at a predetermined velocity along a first straight path and then a second straight path intersecting each other and inclining symmetrically at a predetermined angle relative to the cutting direction of the sheet material, and directing a jet stream of fluid under high pressure from said nozzle toward said sheet material thereby cutting said sheet material into sheets of predetermined length utilizing the energy of the fluid under high pressure.
A method of cutting a web of sheet material continuously fed at a predetermined velocity into sheets of predetermined length, comprising the first cutting step of moving a high-pressure fluid jet nozzle along a first straight path extending across said sheet material and inclining at a predetermined angle relative to the cutting direction of said sheet material and directing a jet stream of fluid under high pressure from said nozzle toward said sheet material thereby cutting one sheet from said sheet material, the second cutting step of moving said nozzle along a second straight path inclining relative to the sheet cutting direction in symmetrical relation with and at the same angle as said first straight path and directing the jet stream of fluid under high pressure from said nozzle toward said sheet material thereby cutting the next sheet from said sheet material, the first shifting step of shifting said nozzle from the terminating position of said first straight path to the starting position of said second straight path between said first and second cutting steps, and the second shifting step of shifting said nozzle from the terminating position of said second straight path to the starting position of said first straight path upon completion of said second cutting step, the moving velocity of said nozzle during said first and second cutting steps and the period of time required for shifting said nozzle during said first and second shifting steps being controlled respectively as a function of the feeding velocity of said sheet material and the angle of inclination of said first and second straight paths relative to the cutting direction of said sheet material, and as a function of the feeding velocity of said sheet material and the length of the sheets cut from said sheet material.
An apparatus for cutting a web of sheet material continuously fed at a predetermined velocity into sheets of predetermined length by a jet stream of fluid under high pressure, comprising a jet nozzle capable of ejecting a jet stream of fluid under high pressure having energy sufficient to cut said sheet material, a track in closed loop form consisting of a pair of straight paths intersecting each other and inclining symmetrically at a predetermined angle relative to the cutting direction of said sheet material and a pair of curved paths connecting the associated ends of said straight paths, a carriage carrying said nozzle and adapted to move along said track, drive means for driving said carriage, and control means for controlling the moving velocity of said carriage as a function of the feeding velociting of said sheet material and the length of sheets cut from said sheet material.
An apparatus for cutting a web of sheet material continuously fed at a predetermined velocity into sheets of predetermined length by a jet stream of fluid under pressure, comprising a jet nozzle for directing a jet stream of fluid under high pressure having energy sufficient to cut said sheet material, a carriage adapted for making reciprocating movement along a straight track, an arm mounting said nozzle at one end thereof and pivoted at the other end thereof to said carriage, and drive means for causing reciprocating movement of said carriage along said straight track at a controlled velocity and causing alternate normal and reverse swinging movement of said arm around the pivot at a controlled angular velocity.
Dependencies are inferred from the claim text.