US3882765A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slitting and scoring apparatus
Assignee: Rengo Co Ltd
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Filing: 1974-05-20
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Granted: 1975-05-13
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Expires: 1994-05-20
Abstract
Abstract Slitting and scoring apparatus capable of instant change of slitting width and scoring position on a material web along its running direction without stopping or reducing the speed of material web which is fed continuously. This apparatus is used particularly in the corrugated board industry.
Inventors
- 👤 Masateru Tokuno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:25
CPC Classifications
B; B23; B23D; B23D35/00; B23D35/008; B65; B65H; B65H2404/00; B65H2404/60; B65H2404/63; B65H2404/631; Y; Y10; Y10T; Y10T83/00; Y10T83/02; Y10T83/0207; Y10T83/0215; Y10T83/0222; Y10T83/202; Y10T83/2074; Y10T83/2083; Y10T83/2085; Y10T83/465; Y10T83/4699; Y10T83/4702
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
378 words
Slitting and scoring apparatus for slitting and scoring a web of material fed continuously in its running direction, comprising; a rotary shear capable of cutting off, at a stroke, the web transversely; a front guide plate for receiving the web at the outlet of the rotary shear and guiding the web rearward, front end of the front guide plate being faced close to the outlet of the rotary shear and rear end of the front guide plate being made to be raised and lowered at a stroke between its first position and its second position situated higher than the first position; an upper guide plate for receiving the web from the front guide plate with its rear end situated in said second position and guiding the web rearward, the front end of the upper guide plate is projected to said second position or between said first position and said second position, and the upper guide plate portion between the both ends thereof being provided with an opening; a lower guide plate for receiving the web from the front guide plate with its rear end situated in said first position and guiding the web rearward, said lower guide plate being placed below the upper guide plate, and the front end of the lower guide plate being projected towards said first position or a position below it, and the lower guide plate being provided with an opening; an upper slitter-scorer provided with more than two slitting and scoring units, each of the slitting and scoring units being able to enter the opening of the upper guide plate to slit and score the web guided into it by the upper guide plate or to get out thereof; a lower slitter-scorer provided with more than two slitting and scoring units, each of which being able to enter the opening of the lower guide plate to slit and score the web guided into it by the lower guide plate and to get out thereof; and a rear guide plate for receiving the slitted and scored web from the upper guide plate or the lower guide plate and guiding it rearward, front end of the rear guide plate being projected towards the rear end of the lower guide plate or a position below it.
Claim 2
Dependent Claim
378 words
Slitting and scoring apparatus for slitting and scoring a web of material fed continuously in its running direction, comprising; a rotary shear capable of cutting off, at a stroke, the web transversely; a front guide plate for receiving the web at the outlet of the rotary shear and guiding the web rearward, front end of the front guide plate being faced close to the outlet of the rotary shear and rear end of the front guide plate being made to be raised and lowered at a stroke between its first position and its second position situated higher than the first position; an upper guide plate for receiving the web from the front guide plate with its rear end situated in said second position and guiding the web rearward, the front end of the upper guide plate is projected to said second position or between said first position and said second position, and the upper guide plate portion between the both ends thereof being provided with an opening; a lower guide plate for receiving the web from the front guide plate with its rear end situated in said first position and guiding the web rearward, said lower guide plate being placed below the upper guide plate, and the front end of the lower guide plate being projected towards said first position or a position below it, and the lower guide plate being provided with an opening; an upper slitter-scorer provided with more than two slitting and scoring units, each of the slitting and scoring units being able to enter the opening of the upper guide plate to slit and score the web guided into it by the upper guide plate or to get out thereof; a lower slitter-scorer provided with more than two slitting and scoring units, each of which being able to enter the opening of the lower guide plate to slit and score the web guided into it by the lower guide plate and to get out thereof; and a rear guide plate for receiving the slitted and scored web from the upper guide plate or the lower guide plate and guiding it rearward, front end of the rear guide plate being projected towards the rear end of the lower guide plate or a position below it.
Claim 3
Dependent Claim
160 words
Apparatus as defined in claim 1, characterized by that each of the slitting and scoring units of the upper slitter-scorer is secured movably upward and downward to a pair of frames standing at the outsides of the opening of the upper guide plate holding the opening therebetween, and is capable of getting out of the opening of the upper guide plate when moving upward and entering the opening of the upper guide plate to slit and score the web of material when moving downward, while each of the slitting and scoring units of the lower slitter-scorer is secured movably upward and downward to a pair of frames standing at the outsides of the opening of the lower guide plate holding the opening therebetween, and is capable of entering the opening of the lower guide plate to slit and score the web of material when moving upward and getting out of the openings of the lower guide plate when moving downward.
Claim 4
Dependent Claim
166 words
Apparatus as defined in claim 1, characterized by that move than two slitting and scoring units of the upper slitter-scorer are attached radially to a pair of rotary frames supported rotatably at the outsides of the opening of the upper guide plate holding the opening therebetween, each of the slitting and scoring units being able to enter the opening of the upper guide plate to slit and score the web of material or get out of the opening by the rotation of the pair of rotary frames, while more than two slitting and scoring units of the lower slitter-scorer are attached radially to a pair of rotary frames supported rotatably at the outsides of the opening of the lower guide plate holding the opening therebetween, each of the slitting and scoring unit being able to enter the opening of the lower guide plate to slit and score the web of material or get out of the opening, by the rotation of the pair of rotary frames.
Claim 5
Dependent Claim
156 words
Apparatus as defined in claim 1, comprising an upper roll equipped with cutting blades on the peripheral surface thereof and disposed transversely to the running direction of the web of material; a lower roll provided with a member capable of receiving the thrust (cut-in) of the cutting blades of the upper roll on the peripheral surface thereof, and disposed in parallel with and below the upper roll with a space through which the web of material is able to pass; a means for rotating the upper roll and the lower roll oppositely to each other to cut off the web of material transversely to the running direction thereof at a single stroke by making the cutting blades of the upper roll cut into said member of the lower roll with the web of material held therebetween; and a means for moving upward and downward at least either one of the upper roll and the lower roll.
Claim 6
Dependent Claim
55 words
Apparatus as difined in claim 1, characterized by that the rear guide plate comprises more than two strips of guide plates arranged in parallel with the running direction of the web of material, and a means for moving upward or downward the rear end of each of the strips of the guide plates is provided.
Claim 7
Dependent Claim
46 words
Apparatus as defined in claim 1, characterized by that there is provided with a means for moving the slitting and scoring units of the upper slitter-scorer and the slitting and scoring units of the lower slitter-scorer transversely to the running direction of the web of 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) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |