Patent US3757619A successfully refreshed from Google Patents.
US3757619A
Expired / Lapsed
US
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Apparatus for feeding and cutting web material
Assignee: AMF Inc
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Filing: 1972-01-27
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Granted: 1973-09-11
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Expires: 1992-01-27
Abstract
Abstract In apparatus wherein a reel of web material is unwound, fed in a substantially linear path by a web feeding means and cut into equal sized sheets by a web cutting means, the improvement comprising means for advancing the web material from the web feeding means to the web cutting means, means for forming a loop in the web material between the web feeding means and said web advancing means, the size of said loop being responsive to the rates of web feed by the web feeding means and the web advancing means, means for de-activating the web advancing means in response to the determination of a predetermined condition downstream thereof, said de-activation of the web advancing means enlarging the loop, means for sensing when the loop reaches a predetermined size, and means responsive to the sensing of a loop of predetermined size for controlling the rate of the web feeding means.
Inventors
- 👤 G Gianese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:52
CPC Classifications
B; B65; B65H; B65H20/00; B65H20/02; B65H20/04; B65H20/24; B65H23/00; B65H23/04; B65H23/18; B65H23/182; B65H23/1825; Y; Y10; Y10T; Y10T83/00; Y10T83/081; Y10T83/091; Y10T83/093; Y10T83/094; Y10T83/202; Y10T83/2092; Y10T83/2181; Y10T83/2207; Y10T83/444; Y10T83/4529; Y10T83/4587; Y10T83/4592; Y10T83/4637; Y10T83/464; Y10T83/465; Y10T83/4766; Y10T83/4783; Y10T83/485; Y10T83/494; Y10T83/501; Y10T83/525; Y10T83/533; Y10T83/536; Y10T83/647; Y10T83/6472; Y10T83/6569; Y10T83/727; Y10T83/734
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
152 words
In apparatus wherein a reel of web material is unwound, fed in a substantially linear path by a web feeding means and cut into equal sized sheets by a web cutting means, the improvement comprising: means for advancing the web material from the web feeding means to the web cutting means, means for forming a loop in the web material between the web feeding means and said web advancing means, the size of said loop being responsive to the rates of web feed by the web feeding means and the web advancing means, means for de-activating the web advancing means in response to the determination of a predetermined condition downstream thereof, said de-activation of the web advancing means enlarging the loop, means for sensing when the loop reaches a predetermined size, and means responsive to the sensing of a loop of predetermined size for controlling the rate of the web feeding means.
Claim 2
Dependent Claim
152 words
In apparatus wherein a reel of web material is unwound, fed in a substantially linear path by a web feeding means and cut into equal sized sheets by a web cutting means, the improvement comprising: means for advancing the web material from the web feeding means to the web cutting means, means for forming a loop in the web material between the web feeding means and said web advancing means, the size of said loop being responsive to the rates of web feed by the web feeding means and the web advancing means, means for de-activating the web advancing means in response to the determination of a predetermined condition downstream thereof, said de-activation of the web advancing means enlarging the loop, means for sensing when the loop reaches a predetermined size, and means responsive to the sensing of a loop of predetermined size for controlling the rate of the web feeding means.
Claim 3
Dependent Claim
71 words
Apparatus according to claim 1, wherein the means for advancing the web material from the web feeding means to the web cutting means includes: a drum having a periphery including a plurality of segments, means mounting the drum at a position whereat the periphery thereof engages the web, means for rotating the drum, and means mounting the segments for inward radial movement to and from the normal periphery of the drum.
Claim 4
Dependent Claim
24 words
Apparatus according to claim 2, wherein said means for de-activating the web advancing means includes means for selectively retracting the segments of the drum.
Claim 5
Dependent Claim
61 words
Apparatus according to claim 1, wherein said means for forming a loop in the web includes an open ended housing mounted above the linear path of the web, the open end of the housing being adjacent said linear path, and means for creating a subatmospheric pressure in said housing to draw the web therein when there is slack in the web.
Claim 6
Dependent Claim
45 words
Apparatus according to claim 4, wherein the means for sensing when the loop reaches a predetermined size includes a photo-sensitive cell mounted in one wall of said housing and a source of light mounted in the opposite wall of the housing in spaced relationship thereto.
Claim 7
Dependent Claim
35 words
Apparatus according to claim 1, wherein the equal sized sheets are fed to a packing machine and the predetermined condition downstream of the web advancing means is a defect in a unit to be packaged.
Claim 8
Dependent Claim
77 words
Apparatus according to claim 1, wherein the web cutting means includes: a platform comprising a plurality of spaced tines adapted to receive the leading portion of the web from the web advancing drum, a cutting member comprising a plurality of tines and a blade at the end thereof, and means for moving the tines of the cutting member through the spaces between the tines of the platform, the blade thereof severing the Web portion on the platform.
Claim 9
Dependent Claim
100 words
Apparatus for advancing a web of material to a cutting mechanism, whereat the web is cut into sheets, which comprises: a drum having a periphery including a plurality of segments, means for mounting the drum at a position whereat the periphery thereof engages a web of material to advance the same to the cutting mechanism, means for mounting the segments of the drum for inward radial movement to and from the normal periphery thereof, and means for selectively retracting a segment of the drum in response to the determination that a cut sheet is not required at a predetermined time.
Claim 10
Dependent Claim
100 words
Apparatus for advancing a web of material to a cutting mechanism, whereat the web is cut into sheets, which comprises: a drum having a periphery including a plurality of segments, means for mounting the drum at a position whereat the periphery thereof engages a web of material to advance the same to the cutting mechanism, means for mounting the segments of the drum for inward radial movement to and from the normal periphery thereof, and means for selectively retracting a segment of the drum in response to the determination that a cut sheet is not required at a predetermined time.
Claim 11
Dependent Claim
76 words
Apparatus according to claim 8, wherein the cutting mechanism includes: a platform comprising a plurality of spaced tines adapted to receive the leading portion of the web from the web advancing drum, a cutting member comprising a plurality of tines and a blade at the end thereof, and means for moving the tines of the cutting member through the spaces between the tines of the platform, the blade thereof severing the web portion of the platform.
Claim 12
Dependent Claim
26 words
Apparatus according to claim 9, wherein the cutting member is operable to convey the severed sheet to a position adjacent the infeed of a packing machine.
Claim 13
Dependent Claim
49 words
Apparatus according to claim 9, wherein the means for moving the cutting member includes: a shaft, means mounting said cutting member on said shaft, means for rotating said shaft, and means for maintaining the attitude of said cutting member substantially parallel to said web receiving platform as it rotates.
Claim 14
Dependent Claim
40 words
Apparatus according to claim 11, wherein there are a plurality of cutting members mounted on said shaft and means are provided for maintaining the attitude of each of said cutting members substantially parallel to the platform as the shaft rotates.
References Cited (Backward Citations)
US1567920A
Cited
US3252640A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |