US4048885A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for cutting continuously moving sheet material by jet stream of fluid under high pressure
Assignee: Individual
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Filing: 1976-03-15
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Granted: 1977-09-20
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Expires: 1996-03-15
Abstract
Abstract 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.
Inventors
- 👤 Hiroshi Miyakita
- 👤 Ichiro Miyakita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:29
CPC Classifications
B; B26; B26D; B26D1/00; B26D1/56; B26D1/60; B26D1/605; B05; B05B; B05B13/00; B05B13/02; B05B13/04; B05B13/0426; B23; B23Q; B23Q1/00; B23Q1/25; B23Q1/44; B23Q1/48; B23Q1/4804; B23Q35/00; B23Q35/04; B23Q35/08; B23Q35/10; B23Q35/101; B23Q35/102; B23Q35/104; B26F; B26F3/00; B26F3/004; Y; Y10; Y10T; Y10T83/00; Y10T83/04; Y10T83/0515; Y10T83/0519; Y10T83/0591; Y10T83/364; Y10T83/465; Y10T83/4691; Y10T83/485; Y10T83/49; Y10T83/869; Y10T83/8737; Y10T83/8769
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
98 words
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.
Claim 2
Independent Claim
98 words
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.
Claim 3
Independent Claim
297 words
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.
Claim 4
Independent Claim
297 words
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.
Claim 5
Independent Claim
148 words
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.
Claim 6
Independent Claim
148 words
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.
Claim 7
Dependent Claim
122 words
An apparatus as claimed in claim 3, wherein said drive means comprises an electro-hydraulic pulse motor for driving said carriage, and said control means comprises pulse control means for controlling the pulse rate of pulses applied to said electro-hydraulic pulse motor in such a manner that the pulse rate of the pulses applied to said pulse motor is proportional to the feeding velocity of said sheet material when said carriage moves along said straight paths in said track, while when said carriage moves along said curved paths in said track, the pulse rate of pulses applied to said pulse motor is decreased the decrease of said pulse rate being a function of the length of the sheets cut from said sheet material.
Claim 8
Independent Claim
117 words
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.
Claim 9
Independent Claim
117 words
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.
Claim 10
Dependent Claim
95 words
An apparatus as claimed in claim 5, wherein said drive means comprises a first electro-hydraulic pulse motor for driving said carriage along said straight track, a second electro-hydraulic pulse motor for swinging said arm around said pivot, and pulse generating means for generating a first and a second train of pulses for driving said first and second electro-hydraulic pulse motors respectively, the number of pulses in said first and second pulse trains being controlled as a function of the feeding velocity of said sheet material and the length of sheets cut from said sheet material.
Claim 11
Dependent Claim
114 words
An apparatus as claimed in claim 6, wherein said pulse generating means comprises control pulse recoading means for reproducibly recording a first train of pulses for controlling the moving velocity of said carriage along said straight track as a function of the position of said jet nozzle along the moving path and a second train of pulses for controlling the angular velocity of swinging movement of said arm, and reproducing rate control means for controlling the rate of reproduction of said first and second pulse trains from said control pulse recording means as a function of the feeding velocity of said sheet material and the length of the sheets cut from said sheet material.
Claim 12
Dependent Claim
153 words
An apparatus as claimed in claim 6, wherein said control pulse generating means comprises a simulated path having the same pattern as the predetermined path of said jet nozzle, a vehicle movable along said simulated path at a controlled velocity, an arm connected at one end thereof to said vehicle, a simulated carriage having the other end of said arm pivoted thereto, a simulated straight track guiding said simulated carriage, a first pulse generator generating a train of pulses corresponding to the moving velocity of said simulated carriage moving along said simulated straight track, a second pulse generator generating a train of pulses corresponding to the angular velocity of said arm swinging relative to said simulated carriage, and means for controlling the velocity of said vehicle moving along said simulated path as a function of the feeding velocity of said sheet material and the length of the sheets cut from said sheet material.
Claim 13
Dependent Claim
129 words
An apparatus as claimed in claim 6, wherein said pulse generating means comprises a recording medium movable at a controlled velocity, a first and a second train of marks arranged on said recording medium in the moving direction thereof and having densities respectively corresponding to the moving velocity of said carriage and the angular velocity of said arm computed previously as a function of the position of said jet nozzle, means for generating a first and a second train of pulses by detecting said first and second mark trains with the movement of said recording medium, and means for controlling the moving velocity of said recording medium as a function of the feeding velocity of said sheet material and the length of the sheets cut from said sheet material.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-19 | 1981-03-21 | 1981-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-19 | 1985-03-21 | 1985-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-19 | 1989-03-21 | 1989-09-20 | $7700.00 | Window Closed / Lapsed |