US3672551A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Burster with interrupted drive
Assignee: Uarco Inc
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Filing: 1970-11-04
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Granted: 1972-06-27
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Expires: 1990-11-04
Abstract
Abstract An improved burster for separating continuous form stationery along transverse lines of weakening wherein the infeed and outfeed rollers are maintained a fixed distance apart, with the outfeed rollers being driven at a faster rate of speed than the infeed rollers. A limited lost motion connection is interposed in the drive to the infeed rollers to allow the infeed rollers to establish an idler relationship relative to the outfeed rollers when the stationery strip is gripped between both sets of rollers so that the infeed rollers rotate at a rate of speed which approaches that of the outfeed rollers. When the limit of the lost motion idler relationship is established the speed of the infeed rollers is rapidly reduced, causing severance of the strip of stationery along the transverse line of weakening.
Inventors
- 👤 Charles L Peterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:51
CPC Classifications
B; B41; B41L; B41L1/00; B41L1/04; B41L1/08; B41L1/12; Y; Y10; Y10T; Y10T225/00; Y10T225/30; Y10T225/35
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
277 words
A burster mechanism for separating continuous forms stationery into individual form lengths between transverse lines of weakening comprising: means defining a frame; a first pair of rollers mounted in said frame in the path of stationery travel for gripping and feeding stationery through the burster; a second pair of rollers also mounted in the frame in the path of stationery travel for gripping and feeding stationery; motor means in the frame; drive means operably associated with said first and second set of rollers for driving the same; the drive means associating said motor means with said first set of rollers including reduction means for normally driving the first set of rollers at a slower rate of speed than the second set of rollers when a strip continuous forms stationery is not simultaneously gripped by both set of rollers, and further including a limited lost motion means to allow the first set of rollers to be rotated a faster rate of speed when a strip of continuous forms stationery is simultaneously gripped by both set of rollers; and means limiting the lost motion connection in the drive means to said first set of rollers to cause tension in the strip of stationery when the stationery strip is simultaneously gripped by both sets of rollErs to promote severance thereof along the transverse line of weakening when the transverse line of weakening is disposed intermediate the first and second pair of rollers, whereupon the strip of stationery will be gripped by only said first pair of rollers and the first pair of rollers will return to a relatively reduced rate of speed with respect to the second set of rollers.
Claim 2
Dependent Claim
277 words
A burster mechanism for separating continuous forms stationery into individual form lengths between transverse lines of weakening comprising: means defining a frame; a first pair of rollers mounted in said frame in the path of stationery travel for gripping and feeding stationery through the burster; a second pair of rollers also mounted in the frame in the path of stationery travel for gripping and feeding stationery; motor means in the frame; drive means operably associated with said first and second set of rollers for driving the same; the drive means associating said motor means with said first set of rollers including reduction means for normally driving the first set of rollers at a slower rate of speed than the second set of rollers when a strip continuous forms stationery is not simultaneously gripped by both set of rollers, and further including a limited lost motion means to allow the first set of rollers to be rotated a faster rate of speed when a strip of continuous forms stationery is simultaneously gripped by both set of rollers; and means limiting the lost motion connection in the drive means to said first set of rollers to cause tension in the strip of stationery when the stationery strip is simultaneously gripped by both sets of rollErs to promote severance thereof along the transverse line of weakening when the transverse line of weakening is disposed intermediate the first and second pair of rollers, whereupon the strip of stationery will be gripped by only said first pair of rollers and the first pair of rollers will return to a relatively reduced rate of speed with respect to the second set of rollers.
Claim 3
Dependent Claim
38 words
The burster device of claim 1 wherein the means limiting the lost motion connection includes means for abruptly decreasing the speed of the first rollers to thereby initiate separation of the stationery along the transverse lines of weakening.
Claim 4
Dependent Claim
30 words
The burster device of claim 1 wherein the drive means connecting the motor means to the first rollers includes a take-off drive from the second rollers to the first rollers.
Claim 5
Dependent Claim
29 words
The burster device of claim 3 wherein the lost motion means for said first rollers is associated with the take-off drive from the second rollers to the first rollers.
Claim 6
Dependent Claim
59 words
The burster device of claim 1 wherein the first roller assembly includes a roller on a shaft and the lost motion means includes a member freely rotatable on the roller shaft with the roller shaft having a radial extension and the rotatable member having spaced apart axial extensions in a position to be engaged by said shaft radial extension.
Claim 7
Dependent Claim
38 words
The burster device of claim 5 wherein one of said spaced apart axial extensions is relatively movable toward and away from the other axial extension to adjust the burster for separating continuous forms stationery of different form lengths.
References Cited (Backward Citations)
US3331543A
Cited
US3338487A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |