The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 03, 1989
Filed:
Jul. 17, 1986
Walter R Crandell, Addison, IL (US);
Fast Heat Element Manufacturing Co., Inc., Oaklawn, IL (US);
Abstract
A unitary integral electrically heated nozzle device for plastic molding or die casting equipment which has a novel casing integral with a heater core, which is insulated to prevent conduction of electricity and loss of thermal transmission to the casing, the electrical insulation being compacted within the casing and around the heater core and the assembly being sealed and swaged into a unitary form, said device being structured to heat the area of a gate or passage for delivery of molten material into a forming cavity. The nozzle device may be shaped, and the nozzle systems include such nozzle devices in the gate channels for delivering molten material to the forming cavity. The invention also includes a heated nozzle of the character referred to wherein at least a part of said electrical insulation comprises a layer of mica or cermaic insulator material having electrical resistance wire wound thereabout, and a method for making such a nozzle which includes the steps of winding electrical resistance wire about a strip of green insulator material, fitting the wire wound strip in a casing and insulating the wire from the casing, compressing the assembly and heating the compressed assembly. The invention also includes a lead arrangement where the unitary nozzle is opened midway its ends to expose the wires and lead are connected sealed and insulated through the casing; and also included is a method for making such a lead arrangement.