US3756527A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for threading a web of plastic film onto a windup roll and winding it thereon
Assignee: EIDP Inc
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Filing: 1970-10-29
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Granted: 1973-09-04
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Expires: 1990-10-29
Abstract
Abstract A web handling method, including a method of threading a web of plastic film onto a windup roll and winding it thereon, including the steps of moving the web continuously from a supply source along a first path by first moving means; slitting the web with web slitters as it moves in the first path to form a leader strip; cutting the leader strip and diverting it into a second moving means including at least one pneumatic strip transport tube positioned adjacent the first path; moving the strip in a second path through the tube by the second moving means; pulling the strip from the tube through a slot therein and into a third path defined by process rolls by third moving means; moving the strip in the third path by the third moving means and into operative relationship with a windup roll; expanding the strip to form the web; moving the web in the third path by the third moving means and into operative relationship with the windup roll; cutting the web and transferring it to the windup roll; and, winding the web onto the windup roll. Apparatus is provided for performing the above described method.
Inventors
- 👤 R Collins
- 👤 R Galli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:07
CPC Classifications
B; B29; B29C; B29C53/00; B29C53/32; Y; Y10; Y10T; Y10T83/00; Y10T83/202; Y10T83/2074
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
94 words
A web handling method including the steps of: moving a web along a first path by web first moving means; slitting the web as it moves in the first path to form a leader strip; moving the strip formed from the web by slitting it along a second path by pneumatic strip second moving means; pulliNg the strip from the second path and into a third path; expanding the strip into web width; and, moving the strip and then the web so expanded along the third path by strip and web third moving means.
Claim 2
Dependent Claim
94 words
A web handling method including the steps of: moving a web along a first path by web first moving means; slitting the web as it moves in the first path to form a leader strip; moving the strip formed from the web by slitting it along a second path by pneumatic strip second moving means; pulliNg the strip from the second path and into a third path; expanding the strip into web width; and, moving the strip and then the web so expanded along the third path by strip and web third moving means.
Claim 3
Dependent Claim
70 words
The method of claim 1 including the further steps of: cutting the strip and diverting it from the first path and into operative association with the second moving means; and wherein the strip is moved by the second moving means through a plurality of pneumatic strip transport tubes defining the second path and directing the strip as it emerges from one tube across an open space into the next tube.
Claim 4
Dependent Claim
24 words
The method of claim 1 wherein the third moving means is adapted to move the web into operative association with a web windup means.
Claim 5
Independent Claim
211 words
A method of threading a full width web onto a windup roll including the steps of: moving the web continuously at a first speed along a first path by first moving means; slitting the web as it moves to form a leader strip; moving the leader strip along the first path by the first moving means; severing the leader strip and diverting it from the first path and into a pneumatic leader strip second moving means including at least one tube having a strip removal slot therein; moving the leader strip at the first speed by the second moving means along a second path through the tube and into operative association with third moving means; increasing the tension on the leader strip by moving it momentarily at a second speed greater than the first speed by the third moving means to pull the leader strip from the slot in the tube and position it in a third path adjacent the windup roll; moving the strip at the first speed again in the third path by the third moving means; expanding the strip into web width; moving the web so expanded along the third path at the first speed by the third moving means; and threading the web onto the windup roll.
Claim 6
Independent Claim
211 words
A method of threading a full width web onto a windup roll including the steps of: moving the web continuously at a first speed along a first path by first moving means; slitting the web as it moves to form a leader strip; moving the leader strip along the first path by the first moving means; severing the leader strip and diverting it from the first path and into a pneumatic leader strip second moving means including at least one tube having a strip removal slot therein; moving the leader strip at the first speed by the second moving means along a second path through the tube and into operative association with third moving means; increasing the tension on the leader strip by moving it momentarily at a second speed greater than the first speed by the third moving means to pull the leader strip from the slot in the tube and position it in a third path adjacent the windup roll; moving the strip at the first speed again in the third path by the third moving means; expanding the strip into web width; moving the web so expanded along the third path at the first speed by the third moving means; and threading the web onto the windup roll.
Claim 7
Dependent Claim
71 words
A strip handling method including the steps of: moving the strip in a path by pneumatic means including at least one strip transport tube having a strip removal slot therein extending continuously the length of such tube through a mid-portion of one of its surfaces in the slot side; pulling the strip from the tube, through the slot and into a process path; and moving the strip in the process path.
Claim 8
Dependent Claim
71 words
A strip handling method including the steps of: moving the strip in a path by pneumatic means including at least one strip transport tube having a strip removal slot therein extending continuously the length of such tube through a mid-portion of one of its surfaces in the slot side; pulling the strip from the tube, through the slot and into a process path; and moving the strip in the process path.
Claim 9
Dependent Claim
110 words
Apparatus for moving a web of material including: means for moving such web from a supply source along a first path; means for forming a leader strip in a web as it moves; means for cutting the leader strip and for diverting the leader strip into a pneumatic strip second moving means for moving the web in a second path; means for operatively connecting the leader strip to a strip and web third moving means for pulling the leader strip from the second moving means and into a third path; means for expanding the strip into web width; and means for moving the web so expanded along the third path.
Claim 10
Dependent Claim
110 words
Apparatus for moving a web of material including: means for moving such web from a supply source along a first path; means for forming a leader strip in a web as it moves; means for cutting the leader strip and for diverting the leader strip into a pneumatic strip second moving means for moving the web in a second path; means for operatively connecting the leader strip to a strip and web third moving means for pulling the leader strip from the second moving means and into a third path; means for expanding the strip into web width; and means for moving the web so expanded along the third path.
Claim 11
Dependent Claim
50 words
The apparatus of claim 6 wherein the second moving means includes at least two strip transport tubes spaced from each other and shaped and positioned to conform to the process configuration and wherein each tube has a strip removal slot therein, which slots face the third path of the web.
Claim 12
Dependent Claim
27 words
The apparatus of claim 6 wherein the leader strip is pulled from each transport tubes through the slot therein and onto process rolls defining the third path.
Claim 13
Dependent Claim
13 words
The apparatus of claim 6 including a flap member for closing each slot.
Claim 14
Dependent Claim
13 words
The apparatus of claim 6 wherein two flap members comprise the slot closure.
Claim 15
Dependent Claim
67 words
The apparatus of claim 6 wherein the second moving means is a series of pneumatic strip transport tubes spaced apart from each other and having exits and pickup horns and wherein the exit of one tube is operatively aligned with the pickup horn of the next-in-line tube, each of the tubes being equipped with eductors whereby the strip is controllably shot across the space Between successive tubes.
Claim 16
Dependent Claim
230 words
Apparatus for winding a web comprising: a web waste shredder for receiving the web; means for moving the web in a first path to the shredder; a slitter with traversing means or moving laterally a pair of vertically actuable knife blades upstream of the shredder for forming a leader strip from the web; an aspirator jet; a retractable diverter-knife means for cutting the strip and diverting it into the opening of the aspirator jet located opposite the diverter-knife means thereby to initiate a strip threading sequence; at least one strip transport tube downstream of the aspirator jet and suitably contoured generally to follow a process path of the web for guiding the strip, each tube comprising a converging pickup horn at the input end of tube for facilitating entry of the strip, a flared exhaust nozzle at the exit end of the tube for snag free removal of the strip, a slotted eductor jet interposed in the tube near the exhaust nozzle for supplying a stream of high velocity fluid parallel to the tube wall, means defining a continuous slot in each tube for removal of the strip from the tube, and a flap for closing each slot; means for pulling the strip through the slot of each tube and into a third path; and third moving means for moving the leader strip, then the web in the third path.
Claim 17
Dependent Claim
230 words
Apparatus for winding a web comprising: a web waste shredder for receiving the web; means for moving the web in a first path to the shredder; a slitter with traversing means or moving laterally a pair of vertically actuable knife blades upstream of the shredder for forming a leader strip from the web; an aspirator jet; a retractable diverter-knife means for cutting the strip and diverting it into the opening of the aspirator jet located opposite the diverter-knife means thereby to initiate a strip threading sequence; at least one strip transport tube downstream of the aspirator jet and suitably contoured generally to follow a process path of the web for guiding the strip, each tube comprising a converging pickup horn at the input end of tube for facilitating entry of the strip, a flared exhaust nozzle at the exit end of the tube for snag free removal of the strip, a slotted eductor jet interposed in the tube near the exhaust nozzle for supplying a stream of high velocity fluid parallel to the tube wall, means defining a continuous slot in each tube for removal of the strip from the tube, and a flap for closing each slot; means for pulling the strip through the slot of each tube and into a third path; and third moving means for moving the leader strip, then the web in the third path.
Claim 18
Dependent Claim
29 words
The apparatus of claim 12 wherein the diverter-knife means is adapted to cut the strip and immediately and substantially simultaneously direct it into the opening of the aspirator jet.
Claim 19
Independent Claim
155 words
An apparatus for winding a web onto a windup roll including: first moving means for moving the web along a first path; means for forming a leader strip in the web as it moves in the first path; pneumatic second moving means; means for cutting the leader strip and diverting it into the pneumatic second moving means including at least one tube having a slot therein for moving the strip in a second path; third moving means for pulling the strip from the slot in second moving means and into a third path and moving in such third path; means for expanding the strip into web width whereafter the third moving means moves the web along the third path and into operative association with a web windup means; means for cutting the web and threading it onto a windup roll of the web windup means; and means for winding the web onto the windup roll.
Claim 20
Independent Claim
155 words
An apparatus for winding a web onto a windup roll including: first moving means for moving the web along a first path; means for forming a leader strip in the web as it moves in the first path; pneumatic second moving means; means for cutting the leader strip and diverting it into the pneumatic second moving means including at least one tube having a slot therein for moving the strip in a second path; third moving means for pulling the strip from the slot in second moving means and into a third path and moving in such third path; means for expanding the strip into web width whereafter the third moving means moves the web along the third path and into operative association with a web windup means; means for cutting the web and threading it onto a windup roll of the web windup means; and means for winding the web onto the windup roll.
Claim 21
Dependent Claim
72 words
A strip handling apparatus including: pneumatic means for moving the strip in a path including at least one strip transport tube having a strip removal slot therein extending continuously the length of such tube through a mid-portion of one of its surfaces in the slot side; means for pulling the strip from the tube, through the slot and into a process path; and means for moving the strip in the process path.
Claim 22
Dependent Claim
72 words
A strip handling apparatus including: pneumatic means for moving the strip in a path including at least one strip transport tube having a strip removal slot therein extending continuously the length of such tube through a mid-portion of one of its surfaces in the slot side; means for pulling the strip from the tube, through the slot and into a process path; and means for moving the strip in the process path.
Claim 23
Dependent Claim
95 words
A web handling method including the steps of: moving a web along a first path; engaging the web with web slitting means to form a leader strip from the web; severing the leader strip from the web and diverting it into a pneumatic second moving means; moving the leader strip along a second path by the pneumatic second moving means; pulling the leader strip from the second path and into a third path; and moving the web slitting means outwardly thereby expanding the leader strip into the web width as it moves in third path.
Claim 24
Dependent Claim
95 words
A web handling method including the steps of: moving a web along a first path; engaging the web with web slitting means to form a leader strip from the web; severing the leader strip from the web and diverting it into a pneumatic second moving means; moving the leader strip along a second path by the pneumatic second moving means; pulling the leader strip from the second path and into a third path; and moving the web slitting means outwardly thereby expanding the leader strip into the web width as it moves in third path.
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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |