Patent US3821370A successfully refreshed from Google Patents.
Patent US3875723A successfully refreshed from Google Patents.
US3875723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wrapping apparatus for cylindrical shapes
Assignee: Leucadia Inc
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Filing: 1973-05-21
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Granted: 1975-04-08
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Expires: 1993-05-21
Abstract
Abstract A packaging machine for cylindrical shapes is disclosed. Wrapping material is applied to the cylindrical shape using vacuum in a new and useful manner whereafter the ends of the wrapping material are gathered, preferably heat shrunk, and then heat sealed, pinched, wired, taped or otherwise closed. An advantage of the machine is its ability to wrap large cylindrical shapes.
Inventors
- 👤 George Holger Sundin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:31
CPC Classifications
B; B65; B65B; B65B41/00; B65B41/12; B65B25/00; B65B25/14; B65B25/146; B65B25/148
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
121 words
A packaging apparatus for packaging of cylinders comprising: a. means for feeding packaging material; b. stationary transporting means for receiving the edges of the packaging material and for transporting the packaging material to the ends of the cylinder to be wrapped said transporting means comprising two plenums having lenghwise channels therein said plenums converging towards each other as they approach the ends of the cylinder; c. vacuum means for maintaining a vacuum in the plenums and to effect the transporting of the packaging material to the ends of the cylinder; d. means for rotating the cylinder to be packaged thus causing the packaging material to envelop it; and e. means for sealing the packaging material at the ends of the cylinder.
Claim 2
Dependent Claim
121 words
A packaging apparatus for packaging of cylinders comprising: a. means for feeding packaging material; b. stationary transporting means for receiving the edges of the packaging material and for transporting the packaging material to the ends of the cylinder to be wrapped said transporting means comprising two plenums having lenghwise channels therein said plenums converging towards each other as they approach the ends of the cylinder; c. vacuum means for maintaining a vacuum in the plenums and to effect the transporting of the packaging material to the ends of the cylinder; d. means for rotating the cylinder to be packaged thus causing the packaging material to envelop it; and e. means for sealing the packaging material at the ends of the cylinder.
Claim 3
Dependent Claim
35 words
The apparatus of claim 1 wherein the sealing means is a heat sealing means and wherein the heat sealing means also serves as means for shrinking the packaging material at the ends of the cylinder.
Claim 4
Dependent Claim
19 words
The apparatus of claim 2 wherein the heat sealing means also serves as means for shrinking the packaging material.
Claim 5
Dependent Claim
21 words
The apparatus of claim 3 wherein the heat sealing means only shrinks the packaging material at the ends of the cylinder.
Claim 6
Dependent Claim
37 words
The apparatus of claim 2 wherein the heat sealing means comprises a heater and a fan to blow hot air from the heater to a shroud which directs the hot air towards the end of the cylinder.
Claim 7
Dependent Claim
24 words
The apparatus of claim 1 further comprising means for shrinking the packaging material at the ends of the cylinder before sealing the packaging material.
Claim 8
Dependent Claim
13 words
The apparatus of claim 1 further including means for cutting the packaging material.
Claim 9
Dependent Claim
13 words
The apparatus of claim 7 wherein the cutting means comprises a hot wire.
Claim 10
Dependent Claim
20 words
The apparatus of claim 1 wherein the plenums are in movable relationship in toward and away direction from each other.
Claim 11
Dependent Claim
23 words
The apparatus of claim 1 wherein the means for rotating the cylinder to be packaged comprises a drive roll and an idler roll.
Claim 12
Dependent Claim
16 words
The apparatus of claim 10 wherein the idler roll and drive roll are adjustable in length.
Claim 13
Independent Claim
108 words
A method for packaging cylindrical materials comprising: a. feeding packaging material to a plenum; b. maintaining a vacuum in the plenum; c. transporting the packaging material through the plenum by vacuum pressure to the ends of a cylinder to be packaged; d. rotating the cylinder; e. contacting the leading edge of the packaging material with the rotating cylinder whereby the packaging material follows the circumference of the cylinder; f. continuing the rotation of the cylinder at least until the cylinder is completely enveloped by the packaging material; and g. sealing the packaging material at the ends of the cylinder while continuing to maintain a vacuum in the plenum.
Claim 14
Independent Claim
108 words
A method for packaging cylindrical materials comprising: a. feeding packaging material to a plenum; b. maintaining a vacuum in the plenum; c. transporting the packaging material through the plenum by vacuum pressure to the ends of a cylinder to be packaged; d. rotating the cylinder; e. contacting the leading edge of the packaging material with the rotating cylinder whereby the packaging material follows the circumference of the cylinder; f. continuing the rotation of the cylinder at least until the cylinder is completely enveloped by the packaging material; and g. sealing the packaging material at the ends of the cylinder while continuing to maintain a vacuum in the plenum.
Claim 15
Dependent Claim
20 words
The method of claim 12 further comprising shrinking the packaging material at the ends of the cylinder before step (g).
References Cited (Backward Citations)
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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) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |