Patent US3566756A successfully refreshed from Google Patents.
US3566756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gusseter guide
Assignee: Chevron USA Inc
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Filing: 1969-01-10
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Granted: 1971-03-02
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Expires: 1989-01-10
Abstract
Abstract A gusset is put into a bubble of blown film just before the film is flattened from a bubble by the pinch rolls by means of a gusseter guide sled which is shaped like a wedge in both lateral and transverse directions. The sled is positioned by a novel apparatus which controls depth of penetration of the sled into the bubble of blown film, and the angle of the sled in the film in both the transverse and lateral direction.
Inventors
- 👤 Richard G Schmid
- 👤 James H Champer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:04
CPC Classifications
B; B29; B29C; B29C53/00; B29C53/02; B29C53/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
274 words
A gusseter guide for putting a gusset into a bubble of blown film comprising: a stationary member parallel to the flow of the said bubble of blown film, said stationary member attached at one end to a stationary frame portion of the building superstructure and at the other end to a positioning means which has mounted upon it a gusseter guide sled shaped like a wedge in both the lateral and the transverse directions and extending into said bubble of blown film with one elongated edge foremost; said positioning means comprising a flat bar extending generally perpendicularly through said stationary member and held in position by a pair of short threaded rods, one of which presses on each side of said flat bar, said pair of threaded rods respectively mounted in a pair of threaded bushings mounted respectively in each side of said stationary member, said flat bar pivotally attached to said gusseter guide sled at one end, and attached at the other end to a rigid member having apertures to receive a pair of elongated threaded rods mounted through said rigid member; one of said pair of elongated threaded rods being mounted through said stationary member in a mated threaded connection and rotatably mounted in a fixed position in a smooth bore aperture of said rigid member; the other of said pair of elongated threaded rods being pivotally mounted to said gusseter guide sled and rotatably mounted through a threaded aperture of said rigid member so that said other rod is substantially parallel to said flat bar; and means for rotating both said pair of elongated and said pair of short threaded rods.
Claim 2
Dependent Claim
274 words
A gusseter guide for putting a gusset into a bubble of blown film comprising: a stationary member parallel to the flow of the said bubble of blown film, said stationary member attached at one end to a stationary frame portion of the building superstructure and at the other end to a positioning means which has mounted upon it a gusseter guide sled shaped like a wedge in both the lateral and the transverse directions and extending into said bubble of blown film with one elongated edge foremost; said positioning means comprising a flat bar extending generally perpendicularly through said stationary member and held in position by a pair of short threaded rods, one of which presses on each side of said flat bar, said pair of threaded rods respectively mounted in a pair of threaded bushings mounted respectively in each side of said stationary member, said flat bar pivotally attached to said gusseter guide sled at one end, and attached at the other end to a rigid member having apertures to receive a pair of elongated threaded rods mounted through said rigid member; one of said pair of elongated threaded rods being mounted through said stationary member in a mated threaded connection and rotatably mounted in a fixed position in a smooth bore aperture of said rigid member; the other of said pair of elongated threaded rods being pivotally mounted to said gusseter guide sled and rotatably mounted through a threaded aperture of said rigid member so that said other rod is substantially parallel to said flat bar; and means for rotating both said pair of elongated and said pair of short threaded rods.
Claim 3
Dependent Claim
13 words
The gusseter guide of claim 1 wherein the gusseter guide sled is wooden.
Claim 4
Dependent Claim
23 words
The gusseter guide of claim 2 wherein the gusseter guide sled is covered with hardboard on the surfaces which contact the blown film.
Claim 5
Dependent Claim
30 words
The gusseter guide of claim 1 wherein the gusseter guide sled is mounted with the small end pointing against the direction of the flow of the blown bubble of film.
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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) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |