Patent US3944111A successfully refreshed from Google Patents.
US3944111A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Freezer liner construction
Assignee: Whirlpool Corp
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Filing: 1974-11-04
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Granted: 1976-03-16
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Expires: 1994-11-04
Abstract
Abstract A freezer liner construction having improved selected foam adhesion characteristics. The outer surface of the liner is provided with a laminated release film which prevents adhesion of the foamed-in-place insulation thereto for optimum stress relief relative to thermal expansion and contraction of the liner relative to the foam and cabinet. One or more adhesion strips are provided on the release laminate to provide localized bonding of the foam to the liner for improved structural integrity in the cabinet structure.
Inventors
- 👤 Clyde Joseph Nonomaque
- 👤 Harry Lucian Tillman
- 👤 Kenneth L. Hortin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:29
CPC Classifications
F; F25; F25D; F25D23/00; F25D23/06; F25D23/065; F25D23/066; Y; Y10; Y10S; Y10S220/00; Y10S220/902
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
78 words
A liner construction for use in a cabinet having insulation foamed-in-place about the outer surface of the liner, comprising: a liner formed of synthetic resin; a foam release material covering substantially the entire outer surface of the liner; and securing means attached to said foam release material at preselected positions for securing the foamed-in-place insulation to the foam release material at said preselected positions whereby said foamed-in-place insulation is effectively secured to the liner at said preselected positions.
Claim 2
Dependent Claim
78 words
A liner construction for use in a cabinet having insulation foamed-in-place about the outer surface of the liner, comprising: a liner formed of synthetic resin; a foam release material covering substantially the entire outer surface of the liner; and securing means attached to said foam release material at preselected positions for securing the foamed-in-place insulation to the foam release material at said preselected positions whereby said foamed-in-place insulation is effectively secured to the liner at said preselected positions.
Claim 3
Dependent Claim
17 words
The liner construction of claim 1 wherein said securing means comprises preformed elements of foam adhering material.
Claim 4
Dependent Claim
18 words
The liner construction of claim 1 wherein said securing means comprises preformed elements of open-cell polyurethane flexible foam.
Claim 5
Dependent Claim
16 words
The liner construction of claim 1 wherein said securing means comprises preformed elements of polypropylene foam.
Claim 6
Dependent Claim
13 words
The liner construction of claim 1 wherein said securing means comprises masking tape.
Claim 7
Dependent Claim
16 words
The liner construction of claim 1 wherein said securing means comprises strips of foam adhering material.
Claim 8
Dependent Claim
28 words
The liner construction of claim 1 wherein said liner defines side walls, said securing means comprising elongated elements of foam adhering material extending vertically on said side walls.
Claim 9
Dependent Claim
35 words
The liner construction of claim 1 wherein said liner defines side walls and a front opening, said securing means comprising elongated elements of foam adhering material extending vertically on said side wall adjacent said opening.
Claim 10
Dependent Claim
28 words
The liner construction of claim 1 wherein said liner defines a top wall, said securing means comprising a preformed element of foam adhering material on said top wall.
Claim 11
Dependent Claim
18 words
The liner construction of claim 1 wherein said positions are preselected to provide structural integrity to the liner.
Claim 12
Dependent Claim
80 words
A liner construction for use in a cabinet having insulation foamed-in-place about the outer surface of the liner, comprising: a liner formed of synthetic resin; a laminate sheet secured to the outer surface of the liner having an outer layer formed of foam release material; and means attached to said outer foam release layer for securing foamed-in-place insulation to preselected portions of said foam release material whereby said foamed-in-place insulation is effectively secured to the liner at said preselected positions.
Claim 13
Dependent Claim
80 words
A liner construction for use in a cabinet having insulation foamed-in-place about the outer surface of the liner, comprising: a liner formed of synthetic resin; a laminate sheet secured to the outer surface of the liner having an outer layer formed of foam release material; and means attached to said outer foam release layer for securing foamed-in-place insulation to preselected portions of said foam release material whereby said foamed-in-place insulation is effectively secured to the liner at said preselected positions.
Claim 14
Dependent Claim
24 words
The liner construction of claim 11 wherein said securing means comprises preformed elements secured to said laminate sheet outer layer at said preselected positions.
Claim 15
Dependent Claim
35 words
The liner construction of claim 11 wherein said securing means comprises means adapted to be torn apart in the event the liner is separated from the foamed-in-place insulation subsequent to completion of the cabinet formation.
Claim 16
Dependent Claim
25 words
The liner construction of claim 11 wherein said securing means comprises preformed elements adhesively secured to said laminate sheet outer layer at said preselected positions.
Claim 17
Dependent Claim
49 words
The liner construction of claim 11 wherein said securing means comprises preformed slightly flexible foam elements adhesively secured to said laminate sheet at said preselected positions to allow a slight degree of movement of the liner relative to the insulation to prevent damaging stress build-up in the liner material.
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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) | 1979-03-16 | 1979-09-15 | 1980-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-16 | 1983-09-15 | 1984-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-16 | 1987-09-15 | 1988-03-16 | $7700.00 | Window Closed / Lapsed |