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US4421973A Expired / Lapsed US ⏱️ 0.0 years remaining

Electric tooth paste tube warmer

Assignee: Individual
•
Filing: 1981-05-18
•
Granted: 1983-12-20
•
Expires: 2001-05-18
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Abstract

Abstract An apparatus for prewarming tooth paste in a tooth paste tube prior to extrusion from the tube through an outlet opening in the end of the tube includes a cap-shaped member of plastic material detachably closing the opening and enveloping the outlet end of the tooth paste tube. The cap-shaped member has an outer skirt portion extending along and surrounding portion of the side wall of the tube adjacent the outlet opening and an electrical resistance heating element is embedded in the cap-shaped member including the outer skirt thereof for warming the outlet section of the tube when the terminals of the heating element are connected to an electrical power source while the tube is closed by the cap-shaped member. A thermostat unit embedded in the cap-shaped member is connected in series with the heating element to control the temperature to which the outlet section of the tube is heated. The electrical terminals are formed in a rigid electrical plug at a stiff area on the cap-shaped member for direct insertion into an electric wall socket as well as for hanging the apparatus thereby.

Inventors

  • 👤 Kwong-Li Lou

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-28 16:48
CPC Classifications
B; B65; B65D; B65D35/00; B65D35/24; H; H05; H05B; H05B3/00

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 169 words
An apparatus for prewarming the tooth paste in a tooth paste tube before it is extruded from the tube through an opening in the end of the tube, said apparatus comprising: a cap-shaped member closing said opening and enveloping the outlet end of said tooth tube, the cap-shaped member having an outer skirt portion extending along and surrounding a portion of the tubular side wall of the tube; an electrical heating element insulated and molded in said cap-shaped member including said outer skirt portion surrounding the side wall of the tube with exterior electrical terminals to the heating element extending on the outside; and connecting means on said cap-shaped member for detachably holding the cap-shaped member on and enclosing the outlet end of said tooth paste tube, whereby the tooth paste in the outlet section of said tooth paste tube is warmed up when the exterior electrical terminals of said electrical heating element are connected to an electrical power source while the tube is closed by the cap-shaped member.
Claim 2
Independent Claim 169 words
An apparatus for prewarming the tooth paste in a tooth paste tube before it is extruded from the tube through an opening in the end of the tube, said apparatus comprising: a cap-shaped member closing said opening and enveloping the outlet end of said tooth tube, the cap-shaped member having an outer skirt portion extending along and surrounding a portion of the tubular side wall of the tube; an electrical heating element insulated and molded in said cap-shaped member including said outer skirt portion surrounding the side wall of the tube with exterior electrical terminals to the heating element extending on the outside; and connecting means on said cap-shaped member for detachably holding the cap-shaped member on and enclosing the outlet end of said tooth paste tube, whereby the tooth paste in the outlet section of said tooth paste tube is warmed up when the exterior electrical terminals of said electrical heating element are connected to an electrical power source while the tube is closed by the cap-shaped member.
Claim 3
Dependent Claim 48 words
The apparatus set forth in claim 1 wherein a thermostat unit embedded in the cap-shaped member is connected in series circuit with the heating element to open or close the series circuit as the temperature of the cap-shaped member is above or below a desired temperature limit, respectively.
Claim 4
Dependent Claim 42 words
The apparatus set forth in claim 1 wherein said electrical terminals are formed in a rigid electrical plug at a stiff area on said cap-shaped member for directly inserting into a wall power socket as well as for hanging the assembly thereby.
Claim 5
Dependent Claim 35 words
The apparatus set forth in claim 1 wherein said connecting means includes the interior of said cap-shaped member having screw threads which engage with corresponding threads on the outlet end of said tooth paste tube.

References Cited (Backward Citations)

US3116403A Cited
US3257922A Cited
US3308993A Cited
US3446402A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1986-12-19 1987-06-20 1987-12-20 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1990-12-19 1991-06-20 1991-12-20 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1994-12-19 1995-06-20 1995-12-20 $7700.00 Window Closed / Lapsed

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