Patent US4461402A successfully refreshed from Google Patents.
US4461402A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Container liner
Assignee: DON FELL Ltd AND LAWRENCE FELL LIMITED
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Filing: 1983-04-01
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Granted: 1984-07-24
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Expires: 2003-04-01
Abstract
Abstract The present invention relates to a disposable liner comprised of a thin sheet plastics material formed into a long tube having left and right sides and a top and bottom. The tube is closed at each end by end panels formed by folded end flaps of the tube. One end panel has located therein an inlet port and an outlet port formed of reinforced plastics sheet material in the form of tubes attached to the panel. Each port surrounds an aperture in the panel. Upper hook fasteners are located at least at the left and right top corners of the liner at both ends thereof and a lower fastener is located along the bottom edge of the liner at one end thereof. The interior surface of the end panel of the liner opposite the inlet port is protected with a flap made of reinforced plastics material.
Inventors
- 👤 Donald R. Fell
- 👤 Seiji Takeuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:44
CPC Classifications
B; B65; B65D; B65D90/00; B65D90/02; B65D90/04; B65D90/046; B65D2590/00; B65D2590/02; B65D2590/04; B65D2590/043; B65D2590/046
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
252 words
A disposable liner for use with a rigid container adapted to be pneumatically filled with a flowable material, said liner comprising: (a) a tube of thin sheet plastics material forming left and right side panels and top and bottom panels; (b) vertically extending front and back end panels being formed by folding and joining end flaps of said tube to provide top, bottom and side edges at the junction of said top and bottom and left and right side panels with said front and back end panels; (c) inlet and outlet ports located in said back end panel, said ports being comprised of tubes of reinforced plastics sheet material, each attached at one end to said back end panel around an aperture located therein; (d) hook attachment means located at least at top corners of said liner adjacent the top edge formed by said front and rear end panels; (e) bottom attachment means located along a bottom edge formed by an end panel; and (f) a protective flap element of reinforced plastics material for protecting the inner surface of said front end panel, said flap element being attached to said liner along the top edge formed by said front end panel to hang adjacent the front end panel and being located opposite said inlet port in the back end panel whereby to protect the front end panel from abrasion when the liner is filled with abrasive flowable material projected pneumatically into the liner through said inlet port towards said front end panel.
Claim 2
Dependent Claim
252 words
A disposable liner for use with a rigid container adapted to be pneumatically filled with a flowable material, said liner comprising: (a) a tube of thin sheet plastics material forming left and right side panels and top and bottom panels; (b) vertically extending front and back end panels being formed by folding and joining end flaps of said tube to provide top, bottom and side edges at the junction of said top and bottom and left and right side panels with said front and back end panels; (c) inlet and outlet ports located in said back end panel, said ports being comprised of tubes of reinforced plastics sheet material, each attached at one end to said back end panel around an aperture located therein; (d) hook attachment means located at least at top corners of said liner adjacent the top edge formed by said front and rear end panels; (e) bottom attachment means located along a bottom edge formed by an end panel; and (f) a protective flap element of reinforced plastics material for protecting the inner surface of said front end panel, said flap element being attached to said liner along the top edge formed by said front end panel to hang adjacent the front end panel and being located opposite said inlet port in the back end panel whereby to protect the front end panel from abrasion when the liner is filled with abrasive flowable material projected pneumatically into the liner through said inlet port towards said front end panel.
Claim 3
Dependent Claim
24 words
The liner according to claim 1, wherein protective flaps hang freely adjacent the back end panel to cover both the inlet and outlet ports.
Claim 4
Dependent Claim
28 words
The liner according to claim 2, wherein the protective flaps covering the inlet and outlet ports and the flap element are made of a woven reinforced plastics material.
Claim 5
Dependent Claim
19 words
The liner according to claim 1, wherein said plastics material is polyethylene having a thickness of about 6 mils.
Claim 6
Dependent Claim
36 words
The liner according to claim 1, wherein said bottom attachment means is comprised of a nailing strip holder heat-sealed to said liner and forming a pocket containing a wooden slat for nailing to said rigid container.
Claim 7
Dependent Claim
23 words
The liner according to claim 1, wherein the bottom attachment means is located along the bottom edge formed by the back end panel.
Claim 8
Dependent Claim
23 words
The liner according to claim 1, wherein the bottom attachment means is located along the bottom edge formed by the front end panel.
Claim 9
Dependent Claim
42 words
The liner according to claim 1, including a vent port comprised of a tube of reinforced plastics sheet material attached at one end to the back end panel around an aperture located therein, and a sheet of netting extending across said aperture.
Claim 10
Dependent Claim
38 words
The liner according to claim 1, including reinforcing flanges surrounding the tubes and located on the outer surface of the back end panel to protect said panel against abrasion by a bulkhead or door provided on the container.
Claim 11
Dependent Claim
22 words
The liner according to claim 1, wherein the tube constituting the outlet port is longer than the tube constituting the inlet port.
Claim 12
Dependent Claim
45 words
The liner according to claim 1, wherein the outlet port is located offset from the centreline of the back end panel to enable discharge from said outlet port to take place while a door is closed across a half of the rear of the container.
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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) | 1987-07-24 | 1988-01-23 | 1988-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-24 | 1992-01-23 | 1992-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-24 | 1996-01-23 | 1996-07-24 | $7700.00 | Window Closed / Lapsed |