Preparing a piece of wood for impregnation

US4596717A · kind A · utility

Assignee

• Dornier System GmbH

Inventors

• Werner Herbert · Markdorf, DE
• Wunnibald Kunz · Friedrichshafen, DE

Key dates

• Filing date: Jul 6, 1984
• Grant date: Jun 24, 1986
• Expiry date: Jul 6, 2004

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T408/453
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

A piece of wood is prepared for impregnation by causing it in steps to be perforated by a plurality of needles which are moved back and forth with the workpiece, and either rotate individually or are subject to additional oscillatory or impact-producing axial movement.