James Marshall Perkins
Land Surveyors at 21 Dr, Phoenix, AZ

License number

Colorado 15687

Issued Date

Aug 1, 1978

Renew Date

Mar 31, 2002

Expiration Date

Mar 31, 2002

Type

Professional Land Surveyor

Address

6210 W 21St Dr, Phoenix, AZ 85015

Professional information

James Perkins - Phoenix, AZ

Work:

State of Arizona DES/DDD - Phoenix, AZ
Habilitation Technician US Air Force Reserves - Luke AFB, AZ
Medical Technician Arizona College of Allied Health - Glendale, AZ
Therapeutic Massage Intern US Air Force Active Duty - Sheppard AFB, TX
Ground Radio Technician

Education:

Arizona College of Allied Health - Glendale, AZ
Diploma

Vacuum Assisted Transfer Mold And Vent Pin

US Patent:

4874308, Oct 17, 1989

Filed:

Apr 4, 1988

Appl. No.:

7/177195

Inventors:

George N. Atlas - Mesa AZ
Leroy C. Donnally - Phoenix AZ
Donald P. Urban - Mesa AZ
James M. Perkins - Phoenix AZ
Timothy C. Wilson - Rancho California CA

International Classification:

B29C 4502, B29C 4534

US Classification:

425544

Abstract:

The mold described has walls disposed about the mold plates and vent pin retainer plates to permit a vacuum to be generated. The vent pins have been designed to be self cleaning. A pin having a generally cylindrical shape is used. A first portion of the pin has a face defined by a chord of the cylinder. The face leaves a small space between the pin and the opening wall which permits the atmosphere to be removed from the cavity. Below the first portion is a second portion, smaller in diameter than the first portion. Below the second portion is a third portion of essentially the same design as the first portion rotated 45. degree. This portion cleans the walls of the opening when the pin is raised to eject the parts.