Dennis B Kupka

US Patent:

51830698, Feb 2, 1993

Filed:

Jan 13, 1992

Appl. No.:

7/820103

Inventors:

Ralph O. Berg - Rochester NY
Fred J. Lang - Rochester NY
Dennis B. Kupka - Albion NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

F16K 3150

US Classification:

137 15

Abstract:

An adjustable valve stem apparatus 10 adapted for use in an injection molding equipment or device comprises a cylindrical body 12 comprising internally threaded fixed portion 14 and moveable portion 16 threadably mounted on a double-ended screw 30. The fixed and moveable portions 14,16 are relatively oppositely threaded with threads of essentially equal pitch. Moveable portion 16 has a means 26 for removably mounting a valve stem 28 which communicates with a mold cavity. The double-ended screw 30 has a socket 38 formed in its top portion for adjusting the moveable portion 16 relative to the fixed portion 14 thereby correspondingly axially displacing the valve stem 28 from a first to second position relative to the workpiece. In a preferred embodiment, the apparatus 10 may be adjusted from the outside of the injection molding equipment, where equipment uptime is critical to the operation.

US Patent:

50805754, Jan 14, 1992

Filed:

May 17, 1991

Appl. No.:

7/702665

Inventors:

Ralph O. Berg - Rochester NY
Fred J. Lang - Rochester NY
Dennis B. Kupka - Albion NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

B29C 4538

US Classification:

425564

Abstract:

An adjustable valve stem apparatus 10 adapted for use in an injection molding equipment or device comprises a cylindrical body 12 comprising internally threaded fixed portion 14 and moveable portion 16 threadably mounted on a double-ended screw 30. The fixed and moveable portions 14,16 are relatively oppositely threaded with threads of essentially equal pitch. Moveable portion 16 has a means 26 for removably mounting a valve stem 28 which communicates with a mold cavity. The double-ended screw 30 has a socket 38 formed in its top portion for adjusting the moveable portion 16 relative to the fixed portion 14 thereby corresponding axially displacing the valve stem 28 from a first to second position relative to the workpiece. In a preferred embodiment, the apparatus 10 may be adjusted from the outside of the injection molding equipment, where equipment uptime is critical to the operation.