US3847046A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for cutting continuous webs
Assignee: Individual
•
Filing: 1973-10-26
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Granted: 1974-11-12
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Expires: 1993-10-26
Abstract
Abstract A device for cutting continuous webs into lengths is disclosed. The device comprises two web feed paths each having a portion common to the other and respective cutter means associated with each feed path. Each feed path is provided with respective web feeder means selectively operable to feed a web past the respective cutter means in co-ordination with the displacement of a displaceable knife element thereof. The device is provided with web change-over means selectably actuatable to render inoperative simultaneously said feeder means and the cutter means associated with one feed path and to render operative simultaneously said feeder means and the cutter means associated with the respective other feed path. The change-over means is actuatable only when the knife elements of the respective cutter means are in mutually corresponding positions, whereby the web change-over takes place when the leading edges of respective webs are each so located at corresponding positions in the respective feed paths that - on the change-over means being actuated - the first length severed from the respective other web is displaced along the common feed path portion in substantially the same time interval as a length severed from the one web would have been had the change-over means not been actuated.
Inventors
- 👤 A Schmermund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:50
CPC Classifications
B; B65; B65H; B65H23/00; B65H23/04; B65H23/24; B65H35/00; B65H35/04; B65H35/08; B65H5/00; B65H5/26; Y; Y10; Y10T; Y10T83/00; Y10T83/202; Y10T83/2092; Y10T83/2183; Y10T83/2185; Y10T83/465; Y10T83/4705; Y10T83/485; Y10T83/492; Y10T83/494; Y10T83/869; Y10T83/8727; Y10T83/8759; Y10T83/8761; Y10T83/8762
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
182 words
A device for cutting continuous webs into lengths comprising, in combination: guide means defining two web feed paths each having a portion common to the other; respective cutter means associated with each said feed path and each having a displaceable knife element; respective web feeder means each selectively operable to feed a web past the respective one of said cutter means in coordination with the displacement of said knife element thereof; web change-over means selectably actuatable to render inoperative substantially simultaneously said feeder means and said cutter means associated with one said feed path and to render operative substantially simultaneously said feeder means and said cutter means associated with the respective other said feed path; and constraining means co-operating with said change-over means and with said knife elements to render said change-over means actuatable when and only when said displaceable knife elements of said respective cutter means are in predetermined and mutually corresponding positions; whereby the web change-over takes place when the leading edges of said respective webs are each located at corresponding positions in the respective ones of said feed paths.
Claim 2
Independent Claim
182 words
A device for cutting continuous webs into lengths comprising, in combination: guide means defining two web feed paths each having a portion common to the other; respective cutter means associated with each said feed path and each having a displaceable knife element; respective web feeder means each selectively operable to feed a web past the respective one of said cutter means in coordination with the displacement of said knife element thereof; web change-over means selectably actuatable to render inoperative substantially simultaneously said feeder means and said cutter means associated with one said feed path and to render operative substantially simultaneously said feeder means and said cutter means associated with the respective other said feed path; and constraining means co-operating with said change-over means and with said knife elements to render said change-over means actuatable when and only when said displaceable knife elements of said respective cutter means are in predetermined and mutually corresponding positions; whereby the web change-over takes place when the leading edges of said respective webs are each located at corresponding positions in the respective ones of said feed paths.
Claim 3
Dependent Claim
40 words
A device as defined in claim 1, comprising respective further feeder means associated with each said feed path to feed lengths of said web severed by said cuttEr means along a feed path portion extending downstream of said cutter means.
Claim 4
Dependent Claim
62 words
A device as defined in claim 2, wherein each said further feeder means feeds said severed lengths along the respective said feed path at substantially the same speed as that at which said selectively operable feeder means feeds a web past said cutter means, whereby successive said severed lengths are fed from the respective said cutter means with substantially no gap therebetween.
Claim 5
Dependent Claim
64 words
A device as defined in claim 2, wherein each said further feeder means feeds said severed lengths along the respective said feed path at a substantially higher speed than that at which said selectively operable feeder means feeds said web past the respective said cutter means, whereby successive said severed lengths are fed from the respective said cutter means with a substantial gap therebetween.
Claim 6
Dependent Claim
43 words
A device as defined in claim 2, wherein each said further feeder means comprises a drivable endless belt downstream of the respective said cutter means to facilitate the transfer of said severed lengths of web along the respective one of said feed paths.
Claim 7
Dependent Claim
59 words
A device as defined in claim 5, wherein each said endless belt is permeable to air, and each passes around respective suction chambers provided with a plurality of apertures through which suction is applied to one surface of the respective said belt to cause said severed lengths of web to adhere to the respective other surface of said belt.
Claim 8
Dependent Claim
101 words
A device as defined in claim 1, comprising a pair of suction roller devices disposed at a junction between said two feed paths, each said roller device comprising a stationary inner portion and an annular outer portion rotatable about said inner portion, said outer portion having radially extending passages therethrough and said inner portion defining a suction chamber of limited peripheral extent, by means of which suction is applied to the radially inner ends of said passages in said outer portion as such passages pass said suction chamber, to cause said severed lengths of web to adhere to said outer portion.
Claim 9
Dependent Claim
29 words
A device as defined in claim 7, wherein said two outer portions define a nip between which said severed lengths of web pass to said common feed path portion.
Claim 10
Dependent Claim
41 words
A device as defined in claim 1, wherein each said cutter means comprises a rotary cutter, said displaceable knife element thereof being rotatable relatively to a stationary knife element to bring said displaceable and stationary knife elements into mutually co-operative action.
Claim 11
Dependent Claim
40 words
A device as defined in claim 9, wherein said displaceable knife elements are so mounted and driven, only a selected one of said elements being driven at any given time, that said selected knife element rotates continuously at uniform speed.
Claim 12
Dependent Claim
44 words
A device as defined in claim 9, wherein said displaceable knife elements are so mounted and driven, only a selected one of said elements being driven at any given time, that said selected knife element executes individual single rotations spaced by periods of rest.
Claim 13
Dependent Claim
194 words
A device as defined in claim 1, wherein said web change-over means comprises a drive shaft rotatable mounted in a support, an elongate central sleeve member mounted on said shaft to rotate therewith and restrained from axial displacement there along, a first sleeve member rotatably mounted on said shaft, disposed on a shaft portion projecting from one end of said central sleeve and axially slidable along said shaft to be selectably coupled to one of said central sleeve and said support, a second sleeve member rotatably mounted on said shaft, disposed on a shaft portion projecting from the respective opposite end of said central sleeve and axially slidable along said shaft to be selectably coupled to one of said support and said central sleeve, first gear means coupling said first sleeve member to said displaceable knife element of said one cutter means, second gear means coupling said second sleeve member to said displaceable knife element of the respectiVe other said cutter means, and displacement means to simultaneously axially displace said first and second sleeves to render inoperative one of said cutter means and to render operative the respective other said cutter means, and vice-versa.
Claim 14
Dependent Claim
116 words
A device as defined in claim 12, wherein said support comprises a first fixed sleeve member mounted on said shaft next adjacent said first slidable sleeve member, and a second fixed sleeve member mounted on said shaft next adjacent said second slidable sleeve member, and wherein mutually co-operable dog clutch means are provided on next adjacent end portions of said first fixed support sleeve and said first slidable sleeve, on next adjacent end portions of said first slidable sleeve and said elongate central sleeve, on next adjacent end portions of said elongate central sleeve and said second slidable sleeve, and on next adjacent end portions of said second slidable sleeve and said second fixed support sleeve.
Claim 15
Dependent Claim
40 words
A device as defined in claim 13, wherein each of said mutually co-operable dog clutch means are mutually engageable only on the respective one of said slidable sleeve members being located in a predetermined angular position on said drive shaft.
Claim 16
Dependent Claim
58 words
A device as defined in claim 12, wherein the web change-over means comprises electrical switch means selectably operable to render inoperative said web feeder means co-ordinated with said cutter means of said one feed path and substantially simultaneously to render operative said feeder means co-ordinated with said cutter means of said respective other web feed path, and vice-versa.
Claim 17
Dependent Claim
22 words
A device as defined in claim 15, wherein actuator means of said electrical switch means is mechanically coupled to said displacement means.
References Cited (Backward Citations)
US2201581A
Cited
US3717057A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-11 | 1978-05-13 | 1978-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-11 | 1982-05-13 | 1982-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-11 | 1986-05-13 | 1986-11-12 | $7700.00 | Window Closed / Lapsed |