US3855890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slitter/perforator apparatus
Assignee: Xerox Corp
•
Filing: 1973-12-17
•
Granted: 1974-12-24
•
Expires: 1993-12-17
Abstract
Abstract Apparatus for cutting or perforating a sheet of material that is moving through a pair of cooperating sheet advancing rolls along a predetermined path of travel. A cutting blade and a perforating blade are eccentrically mounted upon one of the advancing roll support shafts. The blades are arranged so as to be positionable whereby one of the blades can be extended into the sheet path of travel to act upon a sheet moving therealong or, alternatively, both blades can be retracted out of the path of travel to allow a sheet in process to pass untreated through the advancing roll assembly. Preferably the blade backing roller is adjustable to compensate for wear.
Inventors
- 👤 T Lynch
- 👤 D Berner
- 👤 F Hynes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:33
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/65; G03G15/6517; G03G15/6523; B; B26; B26D; B26D1/00; B26D1/01; B26D1/12; B26D1/14; B26D1/22; B26D1/225; B26D5/00; B26D5/02; B26D9/00; B26F; B26F1/00; B26F1/18; B26F1/20; Y; Y10; Y10T; Y10T83/00; Y10T83/465; Y10T83/4766; Y10T83/4795; Y10T83/483; Y10T83/4833; Y10T83/647; Y10T83/6584; Y10T83/6603; Y10T83/768; Y10T83/7738; Y10T83/7743; Y10T83/7751; Y10T83/869; Y10T83/8745; Y10T83/8746; Y10T83/929; Y10T83/9372; Y10T83/9408
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
198 words
An apparatus for perforating a sheet of material that is moving along a predetermined path of travel including: a support means being arranged adjacent to the path of travel; a first blade for operating upon said sheet mounted upon said support means, said blade being movable between an operative position in the path of travel of the sheet and an inoperative position out of the path of travel of the sheet; a second blade for operating upon said sheet mounted upon said support means, said second blade being movable between an operative position in the path of travel of the sheet and an inoperative position out of the path of travel of the sheet, said second blade being eccentric with respect to said first blade, with the eccentricity of said blades being such that when one of said blades is positioned in the path of travel of the sheet the other of said blades is positioned out of the path of travel of the sheet; means cooperating with said blades in their operative position for providing effective cutting or perforating action; and means for positioning said blades into and out of the path of travel of the sheet.
Claim 2
Independent Claim
198 words
An apparatus for perforating a sheet of material that is moving along a predetermined path of travel including: a support means being arranged adjacent to the path of travel; a first blade for operating upon said sheet mounted upon said support means, said blade being movable between an operative position in the path of travel of the sheet and an inoperative position out of the path of travel of the sheet; a second blade for operating upon said sheet mounted upon said support means, said second blade being movable between an operative position in the path of travel of the sheet and an inoperative position out of the path of travel of the sheet, said second blade being eccentric with respect to said first blade, with the eccentricity of said blades being such that when one of said blades is positioned in the path of travel of the sheet the other of said blades is positioned out of the path of travel of the sheet; means cooperating with said blades in their operative position for providing effective cutting or perforating action; and means for positioning said blades into and out of the path of travel of the sheet.
Claim 3
Dependent Claim
23 words
An apparatus as in claim 1 wherein said first blade comprises a cutting blade and wherein said second blade comprises a perforating blade.
Claim 4
Dependent Claim
33 words
An apparatus as in claim 2 wherein said blades are slidably positional transverse to the path of travel of the sheet to vary the width of cut taken by the operative blade element.
Claim 5
Dependent Claim
61 words
An apparatus as in claim 3 wherein said support means includes a shaft having a center and wherein said first blade has a first eccentric center with respect to the center line and wherein said second blade has a second eccentric center with respect to the center line and wherein said first and second eccentric centers are spaced from one another.
Claim 6
Dependent Claim
36 words
An apparatus as in claim 4 wherein the cutting blade and the perforating blade are each mounted to freely rotate upon a double eccentric bearing and wherein said blades are in face-to-face contact with each other.
Claim 7
Dependent Claim
45 words
An apparatus as in claim 1 wherein said blade cooperating means includes blade backing surface arranged to rotate against the operative blade and wherein said blade cooperating means is adjustable with respect to said operative blade to provide a fresh blade backing surface if desired.
Claim 8
Dependent Claim
29 words
An apparatus as in claim 6 wherein said blade cooperating means comprises a backing roller and wherein said backing roller is slidably adjustable with respect to said operative blade.
Claim 9
Dependent Claim
20 words
An apparatus as in claim 7 further including means to bias said operative blade into contact with said backing roller.
Claim 10
Dependent Claim
18 words
An apparatus As in claim 8 further including means for advancing said sheet along said path of travel.
Claim 11
Dependent Claim
173 words
Apparatus for cutting and perforating a sheet of material that is moving along a predetermined path of travel including: a support shaft being arranged adjacent to said path of travel, blade holding means affixed to said support shaft comprising a first sheet cutting blade and a second sheet perforating blade being eccentrically mounted upon said shaft whereby rotation of said shaft positions said first cutting blade into the sheet path of travel to act upon a sheet passing therealong and further rotation of said shaft removes said first blade from the path of travel and positions said second perforating blade in the path of travel to act upon a sheet passing therealong, and actuating means operatively associated with said support shaft for prepositioning said blade holding means, in a first condition wherein the cutting blade is positioned in the path of travel or in a second condition wherein the perforated blade is positioned in the path of travel or in a third position wherein both blades are retracted from said path of travel.
Claim 12
Dependent Claim
173 words
Apparatus for cutting and perforating a sheet of material that is moving along a predetermined path of travel including: a support shaft being arranged adjacent to said path of travel, blade holding means affixed to said support shaft comprising a first sheet cutting blade and a second sheet perforating blade being eccentrically mounted upon said shaft whereby rotation of said shaft positions said first cutting blade into the sheet path of travel to act upon a sheet passing therealong and further rotation of said shaft removes said first blade from the path of travel and positions said second perforating blade in the path of travel to act upon a sheet passing therealong, and actuating means operatively associated with said support shaft for prepositioning said blade holding means, in a first condition wherein the cutting blade is positioned in the path of travel or in a second condition wherein the perforated blade is positioned in the path of travel or in a third position wherein both blades are retracted from said path of travel.
Claim 13
Dependent Claim
37 words
The apparatus of claim 10 further including a backing roller in parallel alignment with said support shaft on the opposite side of said path of travel to contact a preselected blade positioned in said path of travel.
Claim 14
Dependent Claim
20 words
The apparatus of claim 11 wherein said backing roller is arranged to rotate against a blade brought in contact therewith.
Claim 15
Dependent Claim
46 words
The apparatus of claim 11 wherein the support shaft and the backing roller are coaxially aligned with upper and lower pinch rolls, respectively, of a sheet advancing means that is arranged to engage a sheet moving along said path of travel and further advance said sheet.
Claim 16
Dependent Claim
36 words
The apparatus of claim 13 wherein said lower pinch rolls and said backing roll are operatively associated with a drive means for rotating said pinch rolls and the backing roller in the direction of sheet movement.
Claim 17
Dependent Claim
31 words
The apparatus of claim 10 wherein the blade element is slidably positionable transverse to the path of sheet travel to vary the width of cut taken by a selected blade element.
Claim 18
Dependent Claim
49 words
The apparatus of claim 10 wherein the cutting blade and the perforated blade are each mounted to freely rotate upon a double eccentric bearing with their axis eccentric to each other and affixed in eccentric relationship upon a support shaft with the blades in face-to-face contact with each other.
Claim 19
Dependent Claim
20 words
The apparatus of claim 16 having further means to bias the blades into friction driving contact with the backing roller.
Claim 20
Dependent Claim
121 words
In a feed roll assembly of the type wherein a cooperating pair of pinch rolls comprising a set of driven rolls supported in friction contact with a set of idler rollers to advance a sheet of material introduced therebetween, the improvement comprising; an elongated backing roller coaxially aligned with the driven rolls and arranged to move in relation therewith, a blade holding element coaxially aligned with the idler rolls, said blade holding element having a cutting blade and a perforating blade eccentrically mounted within said element, and means to rotate the holding element to place one of said blades into contact with said backing roller whereby a sheet of material advanced through said rolls is acted upon by said one blade.
Claim 21
Dependent Claim
121 words
In a feed roll assembly of the type wherein a cooperating pair of pinch rolls comprising a set of driven rolls supported in friction contact with a set of idler rollers to advance a sheet of material introduced therebetween, the improvement comprising; an elongated backing roller coaxially aligned with the driven rolls and arranged to move in relation therewith, a blade holding element coaxially aligned with the idler rolls, said blade holding element having a cutting blade and a perforating blade eccentrically mounted within said element, and means to rotate the holding element to place one of said blades into contact with said backing roller whereby a sheet of material advanced through said rolls is acted upon by said one blade.
References Cited (Backward Citations)
US1968865A
Cited
US3570335A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |