Patent US3881383A successfully refreshed from Google Patents.
US3881383A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Web severing device
Assignee: UNIWEB INTERNATIONAL Inc
•
Filing: 1973-10-23
•
Granted: 1975-05-06
•
Expires: 1993-10-23
Abstract
Abstract A web severing device for printing presses or the like is provided having a pair of rollers mounted on the press on opposite sides of the web, with the rollers being movable toward or away from each other to engage or disengage the web. One of the rollers carries a severing blade so that when the roller engages a moving web, the motion of the web transmits rotary motion to the roller, causing the roller to swing its blade against the web and thereby sever it.
Inventors
- 👤 Ronald W Alverth
- 👤 Frank Sander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:12
CPC Classifications
B; B26; B26D; B26D1/00; B26D1/01; B26D1/12; B26D1/25; B26D1/34; B26D1/40; B26D1/405; Y; Y10; Y10T; Y10T83/00; Y10T83/465; Y10T83/4728; Y10T83/4766; Y10T83/4795; Y10T83/4824; Y10T83/483; Y10T83/4838; Y10T83/929; Y10T83/9372; Y10T83/9396
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
129 words
A web severing device for a press or the like comprising, in combination, a pair of rotatable rollers freely rotatable in either direction, means for mounting the rollers on the press in generally parallel, spaced apart relationship, said rollers being positioned transverse to the direction of motion of the web and straddling the path of the web so that the web passes between the rollers, means for moving said rollers toward or away from each other to thereby engage or disengage the web between the rollers, and means including a severing blade carried by one of said rollers for severing a moving web, said one of said rollers being operable upon engagement with a moving web to rotate and thereby swing the blade against the web to sever it.
Claim 2
Dependent Claim
129 words
A web severing device for a press or the like comprising, in combination, a pair of rotatable rollers freely rotatable in either direction, means for mounting the rollers on the press in generally parallel, spaced apart relationship, said rollers being positioned transverse to the direction of motion of the web and straddling the path of the web so that the web passes between the rollers, means for moving said rollers toward or away from each other to thereby engage or disengage the web between the rollers, and means including a severing blade carried by one of said rollers for severing a moving web, said one of said rollers being operable upon engagement with a moving web to rotate and thereby swing the blade against the web to sever it.
Claim 3
Dependent Claim
41 words
The web severing device defined by claim 1 in which one of the rollers is fixed and the other roller is movable toward or away from the fixed roller, and in which the severing blade is carried by the movable roller.
Claim 4
Dependent Claim
27 words
The web severing device defined by claim 2 in which the path of the web is horizontal and the rollers are vertically spaced apart straddling the web.
Claim 5
Dependent Claim
32 words
The web severing device defined by claim 3 in which the severing blade when inoperative hangs downwardly from the movable roller, and when operative swings upwardly to engage and sever the web.
Claim 6
Dependent Claim
38 words
The web severing device defined by claim 2 in which the means for moving the movable roller comprises a fluid pressure operated piston and cylinder arrangement having a piston rod secured to each end of the movable roller.
Claim 7
Dependent Claim
50 words
The web severing device defined by claim 5 in which each end of the movable roller is journaled in a bearing slidably disposed in a track extending between the two rollers, and each piston rod is secured to the bearing for effecting sliding movement of the bearing within the track.
Claim 8
Dependent Claim
31 words
The web severing device defined in claim 1 in which the severing blade has a cutting edge which is concave with respect to the axis of the roller which carries it.
Claim 9
Dependent Claim
31 words
The web severing device defined by claim 1 in which the severing blade has a cutting edge which is convex with respect to the axis of the roller which carries it.
Claim 10
Dependent Claim
22 words
The web severing device defined by claim 1 in which the severing blade is a knife blade having a serrated cutting edge.
Claim 11
Dependent Claim
22 words
The web severing device defined by claim 1 in which the blade is freely swingable in either direction to sever the web.
References Cited (Backward Citations)
US1876838A
Cited
US2246957A
Cited
US2369253A
Cited
US2796931A
Cited
US3000250A
Cited
US3315436A
Cited
US3296909A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |