US3712141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disposable thermometer construction
Assignee: Pymah Corp
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Filing: 1971-10-14
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Granted: 1973-01-23
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Expires: 1991-10-14
Abstract
Abstract A thermometer having a thermally sensitive substance deposited on a thermally conductive sheet, e.g., aluminum, and an overlying transparent film carrying indicator means which are superpositionably registerable with the thermally responsive substance for communicating therewith to denote specified temperatures upon change of state of the substance is provided with readily removable shield components associated, respectively with the thermally responsive substance, and the indicator means to protect the thermally responsive substance and indicator means from any adverse environmental conditions which would prohibit, alter or otherwise inhibit proper functioning of the thermometer when actually required for use. The shield component associated with the thermally responsive substance, is of substantially vapor impervious character and comprises a material which is nonreactive with the thermally responsive substance heat sealable to the thermally conductive sheet and so sealed in face-to-face contact to the thermally conductive sheet in covering position over the thermally responsive substance deposits. Such shield component preferably is a two-layer laminate comprised of an ionomer layer selected for its amenability for heat sealing to metal foil, and a vapor-barrier reinforcing layer of a material such as aluminum, polyester or nylon overlaying the ionomer layer and in intimate contact therewith. The other shield component, i.e., associated with the indicator means, is readily removably adhesively secured to the transparent film. Both shield components can be peelably removed from the thermometer by pulling action applied digitally to pull tab means on the shield components. Concurrent with the peeling of the shield components from the transparent film and thermally conductive sheet when rendering to thermometer operative for use, the former is pressed against the thermally conductive sheet to position the indicator means in proper overlying communicating registration with the temperature responsive substance.
Inventors
- 👤 D Chadha
- 👤 B Patel
- 👤 C Pickett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:20
CPC Classifications
G; G01; G01K; G01K11/00; G01K11/06; G01K11/08
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
73 words
The temperature indicating device of claim 1 wherein said thermally conductive sheet is provided with a plurality of cavities in said indicator section, there being a separate deposit of said thermally responsive substance in each of said cavities, the heat seal connection of said shield component with the indicator section face portion of said thermally conductive sheet being such that the entrance to each of said cavities is encircled by said heat seal.
Claim 2
Dependent Claim
67 words
The temperature indicating device of claim 2 wherein said shield component comprises a laminate including a first layer of a material inert in respect of said thermally responsive substance and heat sealable to said thermally conductive sheet and being in contact with said thermally conductive sheet, and a second layer of a material impervious to vapor transmission therethrough overlaying said first layer and in intimate contact therewith.
Claim 3
Dependent Claim
132 words
The temperature indicating device of claim 1 wherein said thermally conductive sheet is a foil of a metal and is provided with a plurality of cavities in said indicator section, there being a separate deposit of said thermally responsive substance in each of said cavities, the heat seal connection of said shield component with the indicator section face portion of said thermally conductive sheet being such that the entrance to each of said cavities is encircled by said heat seal, said shield component comprising a laminate including a first layer of an anionic polymer heat sealed to said thermally conductive sheet and being inert in respect of said thermally responsive substance, and a second layer of a material impervious to vapor transmission therethrough overlaying said first layer and in intimate contact therewith.
Claim 4
Dependent Claim
17 words
The temperature indicating device of claim 4 wherein said thermally conductive sheet is a foil of aluminum.
Claim 5
Dependent Claim
17 words
The temperature indicating device of claim 5 wherein the first layer of said laminate is an Ionomer.
Claim 6
Dependent Claim
16 words
The temperature indicating device of claim 5 wherein the first layer of said laminate is polyethylene.
Claim 7
Dependent Claim
21 words
The temperature indicating device of claim 5 wherein said thermally responsive substance is a solid solution comprised of ortho-chloronitrobenzene and ortho-bromonitrobenzene.
Claim 8
Dependent Claim
16 words
The temperature indicating device of claim 6 wherein the second layer of said laminate is aluminum.
Claim 9
Dependent Claim
17 words
The temperature indicating device of claim 6 wherein the second layer of said laminate is a polyester.
Claim 10
Dependent Claim
16 words
The temperature indicating device of claim 6 wherein the second layer of said laminate is nylon.
Claim 11
Dependent Claim
112 words
The temperature indicating device of claim 4 wherein said shield component is a laminate strip folded upon itself along a fold line to provide a first component portion substantially coextensive with said thermally conductive sheet and a second component portion superposed on said first portion, the first component portion being heat sealed to said thermally conductive sheet, said indicator means being carried on a film support which is substantially coextensive with said thermally conductive sheet, said first and second component portions of said laminate being interposed between said thermally conductive sheet and said film support, said laminate second component portion having an extension portion thereof providing said shield component pull tab means.
Claim 12
Dependent Claim
54 words
The temperature indicating device of claim 12 wherein said indicator section face portion is a substantially planar surface, the entrance to each of said cavities lying in the plane of said face, the first component portion of said shield component being substantially flat and being in heat sealed face-to-face contact with said planar surface.
Claim 13
Dependent Claim
59 words
The temperature indicating device of claim 1 wherein said indicator means is carried on a film support substantially coextensive with said thermally conductive sheet, and another shield component removably connected with said film support and overlaying said indicator means, said oTher shield component embodying pull tab means for digitally peelably removing said other shield component from said film support.
Claim 14
Dependent Claim
37 words
The temperature indicating device of claim 14 wherein said film support has an adhesive face thereon, the indicator means being carried on said adhesive face, said other shield component being removably adhesively secured to said adhesive face.
Claim 15
Dependent Claim
109 words
The temperature indicating device of claim 14 wherein said film support has a face segment thereon corresponding to the indicator section face portion of said thermally conductive sheet, said indicator means being carried on said face segment, said other shield component being a material strip folded upon itself along a fold line to provide a first portion substantially coextensive with said face segment of said film support and a second portion at least coextensive with the first portion, the first portion of said other shield component being adhesively connected with said face segment, the second portion having an extension portion thereof providing said other shield component pull tab means.
Claim 16
Dependent Claim
49 words
The temperature indicating device of claim 16 wherein the indicator section of said thermally conductive sheet and the face segment on said film support comprise first longitudinal parts of the respective thermally conductive sheet and film support, the remaining longitudinal parts of each comprising handle parts for the device.
Claim 17
Dependent Claim
44 words
The temperature indicating device of claim 17 wherein the first-mentioned shield component and said other shield component are disposed such that the fold line of each is proximate the juncture of first and remaining longitudinal parts of said thermally conductive sheet and film support.
Claim 18
Dependent Claim
19 words
The temperature indicating device of claim 15 wherein said other shield component is a strip of a fluro-carbon material.
Claim 19
Dependent Claim
25 words
The temperature indicating device of claim 15 wherein said other shield component is a strip of paper having a release agent on the surfaces thereof.
Claim 20
Dependent Claim
117 words
The temperature indicating device of claim 1 wherein said indicator means is carried on a film support substantially coextensive with said thermally conductive sheet and is provided with an adhesive face, said indicator means being carried at said adhesive face, and another shield component associated with said indicator means, said other shield component comprising a material strip interposed between said first-mentioned shield component and said indicator means, said material strip having opposite face surfaces thereon, said material strip being connected at one of said faces with the first-mentioned shield component, the other of said faces juxtaposed with said indicator means and the adhesive face of said film support, said other face having a release agent coating thereon.
Claim 21
Dependent Claim
170 words
The temperature indicating device of claim 21 wherein said thermally conductive sheet is a foil of a metal, the heat seal connection of said shield component with the indicator section face portion of said thermally conductive sheet being such that the entrance to said cavity is encircled by said heat seal, said shield component comprising a laminate including a first layer of an anionic polymer, and a second layer of a material impervious to vapor transmission therethrough overlaying said first layer and in intimate contact therewith, said laminate being folded upon itself along a fold line to provide a first component portion substantially coextensive with said thermally conductive sheet and a second component portion superposed on said first portion with the first layer thereof juxtaposed with both said indicator means and the indicator section of said thermally conductive sheet, the laminate first layer first component portion being heat sealed to said thermally conductive sheet, said other shield component being heat sealed to the laminate first layer of said second portion.
Claim 22
Dependent Claim
17 words
The temperature indicating device of claim 22 wherein said other shield component comprises a strip of paper.
Claim 23
Dependent Claim
14 words
The temperatUre indicating device of claim 23 wherein said thermally conductive sheet is aluminum.
Claim 24
Dependent Claim
20 words
The temperature indicating device of claim 24 wherein said thermally responsive substance is solid solution comprised of ortho-chloronitrobenzene and ortho-bromonitrobenzene.
Claim 25
Dependent Claim
14 words
The temperature indicating device of claim 25 wherein said anionic polymer is an Ionomer.
Claim 26
Dependent Claim
14 words
The temperature indicating device of claim 21 wherein said release agent is a silicone.
References Cited (Backward Citations)
US3465590A
Cited
US3677088A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |