Semi-automatic stock feeder

US4175688A · kind A · utility

Inventor

• Albert W. Scribner · Darien, US

Key dates

• Filing date: Jan 23, 1978
• Grant date: Nov 27, 1979
• Expiry date: Jan 23, 1998

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T83/4632
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

A pneumatic stock feeder for intermittently advancing strip stock into the work station of a punch press having a reciprocating working ram; the feeder having a control plunger that is adapted to be operated by the press ram. The feeder has an improved and simplified semi-automatic fluid valving arrangement that is adapted to be controlled by the movement of said control plunger whereby the feed slide means of the feeder is normally positioned in an index position, i.e. in a position ready to feed stock, and upon being triggered by a pressure start pulse is actuated through first a feed stroke and then automatically returned through an index stroke back to its normal position where it will remain until the initiation of the next cycle triggering pressure start pulse. The control plunger is movable from a first or normal position to a second or depressed position and then returned to its first position in response to the downward and upward movements respectively of the punch press ram; the feed index cycle being initiated in response to the movement of the control plunger from its depressed position back to its first position.