US3599518A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paperboard cutting apparatus and method
Assignee: Harris Corp
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Filing: 1969-11-17
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Granted: 1971-08-17
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Expires: 1989-11-17
Abstract
Abstract Corrugated paperboard is cut or slit by rotating circular blades having a serrated edge while the paperboard is supported by a full face rotating brush roll juxtaposed to said circular blades. Nozzle means are provided for discharging a mist on the circular blades to clean the same during operation. A support plate is provided adjacent the nip on the feed-in side to prevent the paperboard from drooping and thereby assure a good clean cut.
Inventors
- 👤 Walter J Goettsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:14
CPC Classifications
B; B26; B26D; B26D1/00; B26D1/01; B26D1/12; B26D1/14; B26D1/22; B26D1/225; B23; B23D; B23D35/00; B23D35/008; B26D7/00; B26D7/08; B26D7/088; B26D7/20; B26D2007/202; Y; Y10; Y10T; Y10T83/00; Y10T83/02; Y10T83/0259; Y10T83/04; Y10T83/0605; Y10T83/242; Y10T83/263; Y10T83/647; Y10T83/6584; Y10T83/6592; Y10T83/6596; Y10T83/768; Y10T83/7684; Y10T83/7709; Y10T83/869; Y10T83/8727; Y10T83/8732; Y10T83/929; Y10T83/9309; Y10T83/9312
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
104 words
A method of slitting corrugated paperboard comprising the steps of slitting the paperboard using a plurality of rotating circular blades having a serrated edge while supporting the paperboard by a rotating brush roll juxtaposed to said blades, rotating the brush roll at a speed slightly greater than the speed of the movement of the paperboard and rotating the blade at a yet higher speed, using a brush roll whose bristles are stiff and have an interference fit with the cutting edge on said blades, and supporting the paperboard adjacent the nip of the brush roll and blades by a plate on the feed-in side.
Claim 2
Independent Claim
104 words
A method of slitting corrugated paperboard comprising the steps of slitting the paperboard using a plurality of rotating circular blades having a serrated edge while supporting the paperboard by a rotating brush roll juxtaposed to said blades, rotating the brush roll at a speed slightly greater than the speed of the movement of the paperboard and rotating the blade at a yet higher speed, using a brush roll whose bristles are stiff and have an interference fit with the cutting edge on said blades, and supporting the paperboard adjacent the nip of the brush roll and blades by a plate on the feed-in side.
Claim 3
Dependent Claim
20 words
A method in accordance with claim 1 including discharging a mist onto the blades while the blades slit the paperboard.
Claim 4
Dependent Claim
13 words
A method in accordance with claim 2 wherein said mist is a gas.
Claim 5
Dependent Claim
13 words
A method in accordance with claim 2 wherein said mist includes liquid particles.
Claim 6
Dependent Claim
123 words
Apparatus comprising a frame supporting a rotatable shaft, a plurality of circular blades supported by said shaft at spaced points therealong, a brush roll supported for rotation about an axis parallel to the axis of rotation of said shaft, and the cutting edges of each blade being juxtaposed to a portion of said brush roll, said brush roll having bristles along its entire operative length, said brush roll having stiff bristles positioned so as to have an interference fit with the cutting edge on said blades, so that corrugated paperboard may be cut as it passes between the brush roll and blades, and a plate for supporting the paperboard adjacent the nip between said brush roll and the blades on the feed-in side.
Claim 7
Dependent Claim
123 words
Apparatus comprising a frame supporting a rotatable shaft, a plurality of circular blades supported by said shaft at spaced points therealong, a brush roll supported for rotation about an axis parallel to the axis of rotation of said shaft, and the cutting edges of each blade being juxtaposed to a portion of said brush roll, said brush roll having bristles along its entire operative length, said brush roll having stiff bristles positioned so as to have an interference fit with the cutting edge on said blades, so that corrugated paperboard may be cut as it passes between the brush roll and blades, and a plate for supporting the paperboard adjacent the nip between said brush roll and the blades on the feed-in side.
Claim 8
Dependent Claim
36 words
Apparatus in accordance with claim 5 including a hard coating at the periphery of the blades which is harder than the remainder of the blades, said coating containing single-bevel serrations defining the cutting of the blades.
Claim 9
Dependent Claim
25 words
Apparatus in accordance with claim 5 including nozzle means adjacent the periphery of said blades for discharging a mist at the periphery of said blades.
Claim 10
Dependent Claim
67 words
Apparatus in accordance with claim 7 including on said frame a second shaft, a second brush roll, said second shaft containing a plurality of circular cutting blades, said second shaft and said brush roll being inoperative and movable to a position occupied by said first-mentioned shaft and brush roll so that said nozzle means may discharge mist at the periphery of the blades on the second shaft.
Claim 11
Dependent Claim
177 words
Apparatus comprising a frame, a rotatable shaft, means supporting said shaft on said frame for rotation about the axis of the shaft, a plurality of circular blades supported by said shaft at spaced points therealong, a brush roll supported for rotation about an axis parallel to the axis of rotation of said shaft, the cutting edges of each blade being juxtaposed to a portion of the periphery of said brush roll, said brush roll having bristles along its enTire operative length, said bristles being stiff and positioned so as to have an interference fit with the peripheral cutting edge on said blade so that corrugated paperboard may be cut as it passes between the periphery of the roll and the blade, a plate for supporting the paperboard adjacent the nip between said brush roll and the blades on the feed-in side, means for rotating the brush roll at a speed slightly greater than the speed of paperboard to be cut, and means for rotating said blades at a speed higher than the speed of said brush roll.
Claim 12
Dependent Claim
177 words
Apparatus comprising a frame, a rotatable shaft, means supporting said shaft on said frame for rotation about the axis of the shaft, a plurality of circular blades supported by said shaft at spaced points therealong, a brush roll supported for rotation about an axis parallel to the axis of rotation of said shaft, the cutting edges of each blade being juxtaposed to a portion of the periphery of said brush roll, said brush roll having bristles along its enTire operative length, said bristles being stiff and positioned so as to have an interference fit with the peripheral cutting edge on said blade so that corrugated paperboard may be cut as it passes between the periphery of the roll and the blade, a plate for supporting the paperboard adjacent the nip between said brush roll and the blades on the feed-in side, means for rotating the brush roll at a speed slightly greater than the speed of paperboard to be cut, and means for rotating said blades at a speed higher than the speed of said brush roll.
References Cited (Backward Citations)
US1677915A
Cited
US3424043A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-16 | 1975-02-15 | 1975-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-16 | 1979-02-15 | 1979-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-16 | 1983-02-15 | 1983-08-17 | $7700.00 | Window Closed / Lapsed |