Jon R Erikson

US Patent:

57076596, Jan 13, 1998

Filed:

Jun 6, 1996

Appl. No.:

8/659335

Inventors:

Jon R. Erikson - Rochester Hills MI

Assignee:

Elizabeth Erikson Trust - Rochester Hills MI

International Classification:

B29C 4577

US Classification:

425130

Abstract:

A control system for a gas assisted injection molding apparatus which provides precise and reproducible indication of when the injection of plastic is to terminate and when the pressurized gas is to be introduced on the basis of sensing of the location of the flow front of the injected plastic in the mold cavity. The flow front sensor control system according to the present invention includes: one or more sensors located at one or more predetermined locations of the cavity of a mold of a gas assisted injection molding apparatus, a controller which processes sensed data from the one or more sensors and thereupon sends a signal to the gas assisted plastic inaction molding apparatus to discontinue plastic inaction and introduce pressurized gas. The preferred type of sensor is a temperature sensor; however, other types of sensors, such as a pressure sensor, may be used.

US Patent:

59086416, Jun 1, 1999

Filed:

Aug 8, 1997

Appl. No.:

8/908749

Inventors:

Jon R. Erikson - Rochester Hills MI

Assignee:

Elizabeth Erikson Trust - Rochester MI

International Classification:

B29C 4520

US Classification:

425130

Abstract:

A gas nozzle for a gas assisted injection molding system includes a body having an inlet in fluid communication with a source of pressurized gas, an outlet through which gas leaves the nozzle and a passage extending between the inlet and the outlet. The outlet includes a plurality of apertures wherein at least some of the plurality of apertures have a rectangular shape arranged such that the longitudinal axis of consecutive rectangular shaped apertures are parallel to one another and such that the flow path through the outlet approximates a 1/8 inch hole but does not clog with resin over successive plastic injections into the mold.

US Patent:

58208895, Oct 13, 1998

Filed:

Jan 22, 1996

Appl. No.:

8/589494

Inventors:

Jon R. Erikson - Rochester Hills MI

Assignee:

Elizabeth Erikson Trust - Rochester Hills MI

International Classification:

B29C 4503

US Classification:

425130

Abstract:

A gas nozzle for a gas assisted injection molding system includes a body having an inlet in fluid communication with a source of pressurized gas, an outlet through which the gas leaves the nozzle and a passage extending between the inlet and the outlet. The outlet includes a plurality of apertures arranged in a predetermined manner relative to one another such that the flow path through the outlet approximates a 1/8 inch hole but does not clog with resin over successive plastic injections into the mold.

US Patent:

59391030, Aug 17, 1999

Filed:

Mar 24, 1997

Appl. No.:

8/822725

Inventors:

Jon R. Erikson - Rochester Hills MI

International Classification:

B29C 4516

US Classification:

425130

Abstract:

A gas nozzle for a gas assisted injection molding system includes a body having an inlet in fluid communication with a source of pressurized gas, an outlet through which the gas leaves the nozzle and a passage extending between the inlet and the outlet. The outlet includes a plurality of apertures arranged in a predetermined manner relative to one another such that the flow path through the outlet approximates a 1/8 inch hole but does not clog with resin over successive plastic injections into the mold.

US Patent:

56394055, Jun 17, 1997

Filed:

Sep 1, 1995

Appl. No.:

8/522596

Inventors:

Jon R. Erikson - Rochester Hills MI

Assignee:

Elizabeth Erikson Trust - Rochester Hills MI

International Classification:

B29C 4576
B29C 4578
B29D 2200

US Classification:

264 403

Abstract:

A control system for a gas assisted injection molding apparatus which provides precise and reproducible indication of when the injection of plastic is to terminate and when the pressured gas is to be introduced on basis of sensing of the location of the flow front of the injected plastic in the mold cavity. The flow front sensor control system according to the present invention includes: one or more sensors located at one or more predetermined locations of the cavity of a mold of a gas assisted injection molding apparatus, a controller which processes sensed data from the one or more sensors and thereupon sends a signal to the gas assisted plastic injection molding apparatus to discontinue plastic injection and introduce pressured gas. The preferred type of sensor is a temperature sensor; however, other types of sensors, such as a pressure sensor, may be used.