Gary P Lu

US Patent:

D4241096, May 2, 2000

Filed:

Oct 6, 1995

Appl. No.:

D/044201

Inventors:

David Anthony Edgerley - London, GB
Gary Lu - Granada Hills CA
Jonathan Nguyen - Sharon MA
Ming Kin Leung - London, GB

Assignee:

The Gillette Company - Boston MA

International Classification:

1906

US Classification:

D19 43

US Patent:

60174773, Jan 25, 2000

Filed:

Jul 23, 1996

Appl. No.:

8/686208

Inventors:

Gary Lu - Granada Hills CA
Ganesh V. Rao - Torrance CA
Mingchih M. Tseng - Hingham MA

Assignee:

The Gillette Company - Boston MA

International Classification:

B29C 4706
B29C 4720

US Classification:

2641721

Abstract:

Extrusion apparatus is employed in a co-extrusion process to produce a triangular-shaped barrel for a writing instrument. An inner layer of material is extruded in tubular form having a substantially circular cross-section. A coating layer of three strips of material, equally spaced one from the other, is co-extruded about the outer periphery of the inner layer. A combination of forces produced during the process is effective to distort the inner layer to form a product having a substantially triangular shape.