Mechanical pencil having collet guide

US4230413A · kind A · utility

Assignee

• J.S. STAEDTLER GMBH & CO. KG · DE

Inventor

• Jurgen Gartner · Remscheid, DE

Key dates

• Filing date: Oct 18, 1977
• Grant date: Oct 28, 1980
• Expiry date: Oct 18, 1997

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B43K21/027
• WIPO field: Other consumer goods
• WIPO sector: Other fields

Abstract

A mechanical pencil of the type in which a lead is gripped in a collet clamped about the lead by engagement between cooperating conical faces of a clamping ring and respective movable ends of two elongated collet members which form the collet and pass through the ring. The collet members are connected together at their other ends. The pencil is readily disassembled and assembled because the movable ends, when in the clamping position, are shaped to interfit with the bore of the ring, so as to permit passage of the collet through the ring in one angular position of the collet relative to the ring while preventing such passage except for limited axial movement in another angular position. Cooperating guide elements on the collet and ring hold the collet in the another angular position. A tubular closure member is releasably fastened to the barrel, and in the another position the collet can be axially displaced relative to the ring when the closure member is released.