US 4,398,083 AGranted

Electric heating apparatus for pre-heating and molding fillet-forming wax strips

OwnerCharles H. Mackinventor

Life of this patent

Estimating the term…

Loading patent…

Abstract

An electric heating apparatus for softening and molding fillet wax strips used in foundry molds and castings includes a housing supporting a plurality of electric radiant heaters, such as lamps, above a platform for holding strips of fillet wax during preheating. An electronic control circuit is provided in the housing for varying the heat output of the radiant heaters and includes a thermostat located between the heater and the platform for limiting the temperature to prevent melting of the wax strips. Electrically heat fillet-forming tools, supported in holder on the housing during non-use periods, are provided for forming the preheated wax strips after application thereof to a mold. The tools are provided with ball-shaped tips and the housing is provided with a separate adjustable electronic control circuits for each tool so that the heat output of each tool can be adjusted to a temperature appropriate to the particular wax being worked and the size of the ball-shaped tip.

Claims5

Dependent claims

An electric heating apparatus for fillet wax, said apparatus including:

a housing
a platform in said housing for holding strips of wax,
an electric radiant heater element supported by said housing and disposed above the platform in spaced relation thereto,
an electric circuit in said housing for energizing the heater element,
a thermostat in the circuit and located between the heater element and the platform for limiting the ambient temperature of the space between said heater element and said platform
said circuit including means for varying the voltage applied to said heater element and thereby the heat output thereof,
a fillet-forming tool having a tip,
a holder on said housing for supporting said fillet-forming tool during non-use periods, said tool including
an electric heating element to heat the tip,
an electric circuit in said housing and connected to said tool by a flexible power cord for energizing the element,
said heating element circuit including a potentiometer for adjusting the voltage and thereby regulating the heat output of the heating element,
said heater element being operative so that the wax is kept at a soft but not melting temperature.

9 more elements

Dependencies are inferred from the claim text.

Facts

Application: 06/277,518Filed 26 Jun 1981 · continuation
Priority: 11 Jul 1979
Granted: 9 Aug 1983
Term ends: Not estimatedThe source records don’t support an estimate.

Classification12 codes

B23K 3/033
Electrically heated: comprising means for controlling or selecting the temperature or power
B22C 7/02
Patterns; Manufacture thereof so far as not provided for in other classes: lost patterns
B29C 65/18
By heating, with or without pressure: using heated tools
B29C 65/4815
Non-reactive adhesives, e.g. physically hardening adhesives: hot melt adhesives, e.g. thermoplastic adhesives

Family

Serial56,589Parent of this continuation · filed 11 Jul 1979
US 4,398,083 AThis patent

From the US filing history. Foreign family members aren’t listed.

Timeline

Citations

Open elsewhere

Building an agent or pulling many patents? Use the API or MCP server instead of scraping pages. Get an API key