US3626798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for slitting lengthwise moving webs
Assignee: Arjo Wiggins Ltd
•
Filing: 1968-02-09
•
Granted: 1971-12-14
•
Expires: 1988-02-09
Abstract
Abstract Apparatus for removing samples from a lengthwise moving web comprises at least one cutting element supported for movement towards and away from the web and actuating means which are operatively connected with support means for the cutter elements and which first effect entry of the cutting element into the web at a controlled rate and after insertion of the cutting element through the web effect transverse movements of the cutting element so that the web is slit between the longitudinal edges of the web.
Inventors
- 👤 Hew Mcinnes Grierson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:19
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/34; G01N33/346; B; B26; B26D; B26D1/00; B26D1/01; B26D1/02; B26D1/025; B26D3/00; B26D3/10; D; D03; D03J; D03J1/00; D21; D21G; D21G9/00; D21G9/0081; D03J2700/00; D03J2700/06; Y; Y10; Y10S; Y10S83/00; Y10S83/919; Y10T; Y10T83/00; Y10T83/202; Y10T83/2074; Y10T83/2083; Y10T83/869; Y10T83/8736; Y10T83/8748; Y10T83/8749; Y10T83/875
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
200 words
Apparatus for removing a lozenge-shaped sample from an unsupported lengthwise moving web, comprising a cutter device including at least one pair of cutting elements, carried by support means for pivotal movement towards and away from the web, said support means comprising a pair of arms each mounting one of said cutting elements, means mounting said arms for pivotal movement towards and away from said web and for movement towards and away from each other, and actuating means cooperating with said support means and operable to effect movement of the cutting elements into and out of engagement with the web at a predetermined distance from an edge of the web and movement thereof in a direction transverse to the direction of movement of the web in a manner such that the lozenge-shaped sample is cut in the web, said actuating means including a rotAtable driving shaft having eccentric portions rotatable in said arms to support the weight of the arms and cutting elements, and cam means for moving said arms towards and away from each other while the cutting elements are engaged with the web to effect movement of the cutting elements transversely to the direction of movement of the web.
Claim 2
Dependent Claim
200 words
Apparatus for removing a lozenge-shaped sample from an unsupported lengthwise moving web, comprising a cutter device including at least one pair of cutting elements, carried by support means for pivotal movement towards and away from the web, said support means comprising a pair of arms each mounting one of said cutting elements, means mounting said arms for pivotal movement towards and away from said web and for movement towards and away from each other, and actuating means cooperating with said support means and operable to effect movement of the cutting elements into and out of engagement with the web at a predetermined distance from an edge of the web and movement thereof in a direction transverse to the direction of movement of the web in a manner such that the lozenge-shaped sample is cut in the web, said actuating means including a rotAtable driving shaft having eccentric portions rotatable in said arms to support the weight of the arms and cutting elements, and cam means for moving said arms towards and away from each other while the cutting elements are engaged with the web to effect movement of the cutting elements transversely to the direction of movement of the web.
Claim 3
Dependent Claim
25 words
Apparatus according to claim 1 including follower means on said arms engaging said cam means, and resilient means normally urging said arms towards each other.
Claim 4
Dependent Claim
124 words
Apparatus according to claim 2, wherein the arms are biased to cause engagement of the tips of the cutter elements in the starting and initial paper-piercing positions thereof, the cam means is operable following piercing of the web first to move the cutter elements apart against the bias thereof to form divergent slits of desired length, next to maintain the cutting elements in spaced relation to form parallel slits of desired length in continuation of the divergent slits, and thereafter to return the cutter elements to the tip engaging positions thereof while forming convergent slits in continuation of the parallel slits so that a substantially lozenge-shaped sample is cut from the web, and then to restore the cutter elements to the starting positions thereof.
Claim 5
Dependent Claim
56 words
Apparatus according to claim 3, wherein the tips of the cutting elements extend away from the arms towards the web and that portion of each cutting element which extends away from the arm on which the cutting element is mounted has the form of an obtuse-angled triangle the apex of which is directed towards the web.
Claim 6
Dependent Claim
71 words
Apparatus according to claim 3, wherein a diverter element is supported for oscillatory movement about the pivotal axis of the cutter device and has the free end thereof located beyond the cutting elements, and the actuating means includes a member arranged to effect oscillation of the diverter element in a manner such that the diverter element engages and removes the lozenge-shaped sample cut out of the web by the cutting elements.
Claim 7
Dependent Claim
36 words
Apparatus according to claim 5, wherein the member for oscillating the diverter element comprises a further eccentric member rotatable with the driving shaft, and the diverter element is spring-urged into engagement with said further eccentric member.
Claim 8
Dependent Claim
62 words
Apparatus according to claim 1, wherein at least two cutter devices are mounted one each on a bracket slidable lengthwise of a fixed bar extending transversely across the path of the web, the brackets are retained in spaced relation lengthwise of the bar by connecting links, and the driving shafts of the cutter devices are coupled for simultaneous rotation by link shafts.
Claim 9
Dependent Claim
64 words
Apparatus according to claim 1, wherein the cutter device is supported for reciprocable movement transversely across the path of the web and traversing means is operable to effect reciprocation of the cutter device during a web slitting operation effected thereby whereby the longitudinal axis of the lozenge-shaped sample cut from the web extends partially across the web between the longitudinal edges of the web.
Claim 10
Dependent Claim
90 words
Apparatus according to claim 8, wherein the cutter device includes a rotatable primary shaft having a gear wheel rotatable therewith and meshing with a pinion carried by the driving shaft to effect rotation thereof, a stationary cam, and a disc rotatable with the primary shaft and provided with at least one retractable radially extending pin engageable with the stationary cam during movement of the cutter device from the starting position thereof by said traversing means thereby to effect rotation of the primary shaft and one revolution of the driving shaft.
Claim 11
Dependent Claim
33 words
Apparatus according to claim 9, wherein the disk is provided with a plurality of retractable pins and the ratio of the gear wheel and pinion is equal to the number of the pins.
Claim 12
Dependent Claim
24 words
Apparatus according to claim 9, wherein the cam includes a ramp operable to depress the pin during the return movement of the cutter device.
Claim 13
Dependent Claim
43 words
Apparatus accordiNg to claim 8, wherein the cutter device is pivotally mounted on a bracket slidable lengthwise of a fixed bar and is angularly adjustable about its pivot to conform the cutting elements to the vectorial resultant of cutter device and web velocity.
Claim 14
Dependent Claim
24 words
Apparatus according to claim 8, wherein the traversing means comprises a nut carried by the cutter device and threaded on a rotatable lead screw.
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) | 1974-12-13 | 1975-06-14 | 1975-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-13 | 1979-06-14 | 1979-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-13 | 1983-06-14 | 1983-12-14 | $7700.00 | Window Closed / Lapsed |