US4691497A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Film lamination stretch wrapping
Assignee: Lantech Inc
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Filing: 1986-03-28
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Granted: 1987-09-08
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Expires: 2006-03-28
Abstract
Abstract A method and apparatus for assembling and dispensing a multi-ply web and wrapping a load with the multi-ply web includes a film web dispenser for receiving a plurality of webs from a plurality of rolls of web material, juxtaposing the plurality of webs to form a multi-ply web and dispensing the multi-ply web. The load is rotated relative to the film web dispenser to wrap the multi-ply film on the load and tension is maintained on the multi-ply web between the film web dispenser and the load. A core material such as a web of foam, UV-resistant material, or reinforcement netting is inserted between the plurality of webs prior to dispensing the multi-ply web. Rollers and a clutch and brake assembly are used to intermittently forward the web of core material.
Inventors
- 👤 William G. Lancaster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:45
CPC Classifications
B; B65; B65B; B65B11/00; B65B11/04; B65B11/045
Claims Analysis
Total Claims: 39
Claim 1
Independent Claim
158 words
An apparatus for assembling and dispensing a multi-ply web and wrapping a load with the multi-ply web comprising: a film web dispenser including first and second upstream roller means which are spaced from each other, each for receiving at least one of a plurality of webs provided by at least two rolls of web material, downstream roller means for receiving the plurality of webs from the upstream roller means and for dispensing the film web as a multi-ply film web, and means for prestretching at least one of the webs between the upstream and downstream roller means; means for rotating the load relative to the film web dispenser to wrap the multi-ply web on the load; means for maintaining tension on the multi-ply web between the dispenser and the load; and means for inserting a core material between the plurality of webs upstream of the downstream roller means and downstream of the first and second upstream roller means.
Claim 2
Independent Claim
158 words
An apparatus for assembling and dispensing a multi-ply web and wrapping a load with the multi-ply web comprising: a film web dispenser including first and second upstream roller means which are spaced from each other, each for receiving at least one of a plurality of webs provided by at least two rolls of web material, downstream roller means for receiving the plurality of webs from the upstream roller means and for dispensing the film web as a multi-ply film web, and means for prestretching at least one of the webs between the upstream and downstream roller means; means for rotating the load relative to the film web dispenser to wrap the multi-ply web on the load; means for maintaining tension on the multi-ply web between the dispenser and the load; and means for inserting a core material between the plurality of webs upstream of the downstream roller means and downstream of the first and second upstream roller means.
Claim 3
Dependent Claim
18 words
The apparatus of claim 1 wherein the insertion means includes means for forwarding a web of core material.
Claim 4
Dependent Claim
22 words
The apparatus of claim 2 wherein the forwarding means includes selectively powered rollers for intermittent forwarding of the web of core material.
Claim 5
Dependent Claim
32 words
The apparatus of claim 3 wherein the forwarding means includes clutch means for selectively engaging the selectively powered rollers with a power drive for intermittent forwarding of the web of core material.
Claim 6
Dependent Claim
20 words
The apparatus of claim 3 wherein the intermittent forwarding means includes brake means for selectively braking the selectively powered rollers.
Claim 7
Dependent Claim
15 words
The apparatus of claim 3 including means for selectively severing the web of core material.
Claim 8
Dependent Claim
18 words
The apparatus of claim 1 including means for juxtaposing the plurality of webs on the downstream roller means.
Claim 9
Independent Claim
139 words
A method for assembling and dispensing a multi-ply web and wrapping a load with the multi-ply web comprising: receiving a plurality of webs from a plurality of rolls of web material; forming a leading edge portion comprised of the plurality of webs without a core material therebetween; inserting a core material between the plurality of webs at positions spaced behind the leading edge portion; juxtaposing the plurality of webs to form a multi-ply web; dispensing the multi-ply web from a film web dispenser; clamping the leading edge portion to hold the plurality of webs to the load while wrapping; rotating the load relative to the film web dispenser to wrap the multi-ply web on the load; and maintaining tension on the multi-ply web between the film web dispesner and the load while wrapping the multi-ply web on the load.
Claim 10
Independent Claim
139 words
A method for assembling and dispensing a multi-ply web and wrapping a load with the multi-ply web comprising: receiving a plurality of webs from a plurality of rolls of web material; forming a leading edge portion comprised of the plurality of webs without a core material therebetween; inserting a core material between the plurality of webs at positions spaced behind the leading edge portion; juxtaposing the plurality of webs to form a multi-ply web; dispensing the multi-ply web from a film web dispenser; clamping the leading edge portion to hold the plurality of webs to the load while wrapping; rotating the load relative to the film web dispenser to wrap the multi-ply web on the load; and maintaining tension on the multi-ply web between the film web dispesner and the load while wrapping the multi-ply web on the load.
Claim 11
Dependent Claim
19 words
The method of claim 8 including prestretching at least one of the webs prior to dispensing the multi-ply web.
Claim 12
Dependent Claim
31 words
The method of claim 9 including maintaining about the same elongation on the web between the film web dispenser and the load as the elongation on the web during the prestretching.
Claim 13
Dependent Claim
13 words
The method of claim 9 including laminating the multi-ply web during the prestretching.
Claim 14
Dependent Claim
14 words
The method of claim 8 including inserting a cushion material during the inserting step.
Claim 15
Dependent Claim
15 words
The method of claim 8 including inserting a UV resistant material during the inserting step.
Claim 16
Dependent Claim
16 words
The method of claim 8 wherein the juxtaposing step is performed prior to the dispensing step.
Claim 17
Dependent Claim
15 words
The method of claim 8 including inserting a reinforcement web netting during the inserting step.
Claim 18
Dependent Claim
16 words
The method of claim 8 including intermittently inserting core material from a roll of web material.
Claim 19
Dependent Claim
17 words
The method of claim 16 including selectively advancing the web of core material with selectively powered rollers.
Claim 20
Dependent Claim
17 words
The method of claim 17 including severing the core material by selectively braking the selectively powered rollers.
Claim 21
Dependent Claim
13 words
The method of claim 17 including severing the core material with a cutter.
Claim 22
Dependent Claim
18 words
The method of claim 9 including prestretching each of the plurality of webs to about the same elongation.
Claim 23
Dependent Claim
16 words
The method of claim 20, including prestretching a plurality of webs of the same stress-strain characteristic.
Claim 24
Dependent Claim
87 words
The method of claim 8 including wiping down the trailing edge portion of the plurality of webs against the load to hold the trailing edge portion in place against the load and selectively inserting the core material at positions spaced ahead of the trailing edge portion so that the trailing edge portion of the multi-ply web includes the plurality of webs without the core material and so that a portion of the multi-ply web including the plurality of webs and not the core material is wiped down.
Claim 25
Independent Claim
159 words
A method for assembling and dispensing a multi-ply web and wrapping a load with the multi-ply web comprising: receiving a plurality of webs from a plurality of rolls of web material; inserting a core material between the plurality of webs; juxtaposing the plurality of webs to form a multi-ply web; dispensing the multi-ply web from a film web dispenser; holding the plurality of webs to the load; rotating the load relative to the film web dispenser to wrap the multi-ply web on the load; maintaining tesnion on the multi-ply web between the film web dispenser and the load while the wrapping the multi-ply web on the load; forming and dispensing a trailing edge portion comprised of the plurality of webs without the core material therebetween by terminating the steps of inserting the core material between the plurality of webs; wiping down the trailing edge portion against the load to hold the trailing edge portion in place against the load.
Claim 26
Independent Claim
159 words
A method for assembling and dispensing a multi-ply web and wrapping a load with the multi-ply web comprising: receiving a plurality of webs from a plurality of rolls of web material; inserting a core material between the plurality of webs; juxtaposing the plurality of webs to form a multi-ply web; dispensing the multi-ply web from a film web dispenser; holding the plurality of webs to the load; rotating the load relative to the film web dispenser to wrap the multi-ply web on the load; maintaining tesnion on the multi-ply web between the film web dispenser and the load while the wrapping the multi-ply web on the load; forming and dispensing a trailing edge portion comprised of the plurality of webs without the core material therebetween by terminating the steps of inserting the core material between the plurality of webs; wiping down the trailing edge portion against the load to hold the trailing edge portion in place against the load.
Claim 27
Dependent Claim
19 words
The method of claim 23 including prestretching at least one of the webs prior to dispensing the multi-ply web.
Claim 28
Dependent Claim
31 words
The method of claim 24 including maintaining about the same elongation on the web between the film web dispenser and the load as the elongation on the web during the prestretching.
Claim 29
Dependent Claim
13 words
The method of claim 24 including laminating the multi-ply web during the prestretching.
Claim 30
Dependent Claim
14 words
The method of claim 23 including inserting a cushion material during the inserting step.
Claim 31
Dependent Claim
15 words
The method of claim 23 including inserting a UV resistant material during the inserting step.
Claim 32
Dependent Claim
16 words
The method of claim 23 wherein the juxtaposing step is performed prior to the dispensing step.
Claim 33
Dependent Claim
15 words
The method of claim 23 including inserting a reinforcement web netting during the inserting step.
Claim 34
Dependent Claim
16 words
The method of claim 23 including intermittently inserting core material from a roll of web material.
Claim 35
Dependent Claim
17 words
The method of claim 31 including selectively advancing the web of core material with selectively powered rollers.
Claim 36
Dependent Claim
17 words
The method of claim 32 including severing the core material by selectively braking the selectively powered rollers.
Claim 37
Dependent Claim
13 words
The method of claim 32 including severing the core material with a cutter.
Claim 38
Dependent Claim
18 words
The method of claim 24 including prestretching each of the plurality of webs to about the same elongation.
Claim 39
Dependent Claim
16 words
The method of claim 24, including prestretching a plurality of webs of the same stress-strain characteristic.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-09-07 | 1991-03-09 | 1991-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-07 | 1995-03-09 | 1995-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-07 | 1999-03-09 | 1999-09-08 | $7700.00 | Window Closed / Lapsed |