# US 4,399,937 A · High speed dual slide stock feeder

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 4,399,937 A
- Document ID: US4399937A
- Status: Granted
- Kind: A
- Application number: 06/318,200
- Filed: 1981-11-04
- Granted: 1983-08-23
- Earliest claimed: 1981-11-04
- Inventors: Albert W. Scribner
- Web page: https://patentgrep.com/patent/US4399937A

## CPC

- B21D 43/11: for feeding sheet or strip material
- B21D: WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL (working or processing of wire B21F)

## Abstract

An improved high speed pneumatic feeder for a punch press or the like wherein a novel combination of a pair of feed slides and a stock guide means extending longitudinally between said feed slides serves to prevent very thin strip stock from buckling while being rapidly pushed by the feed slides through the feeder.

## Claims

### Claim 1

A pneumatic feeder for intermittently advancing thin stock into the work station of a punch press or the like: comprising the combination of
a frame;
a cooperating pair of laterally opposed feed slides reciprocally mounted on said frame;
stock gripping means carried by each of said two feed slides, said stock gripping means having mutually facing inner ends; fluid motor means for actuating said stock gripping means; a main fluid motor means for actuating said two feed slides in opposed phase relation so that said feed slides one after the other may produce the successive stock feed strokes of the feeder, the resultant reciprocation of said stock gripping means with said feed slides thereby effectively defining a horizontal stock feed plane;
stock guide means carried by said frame for retaining the stock located in the feeder in said feed plane;
said stock guide means including a guide member supported so as to extend longitudinally of the feeder and between the mutually facing inner ends of said reciprocating stock gripping means;
said guide member having a horizontal edge surface that is adapted to be disposed immediately adjacent the surface of that longitudinal center portion of said stock that is located between the said inner ends of said two stock gripping means so as to prevent buckling of the successive portions of the stock located in the feeder during feed operations.

### Claim 2 (depends on 1)

Apparatus as defined by claim 1 wherein said edge surface of said guide means is adapted to be disposed closely adjacent to the upper surface of the said stock in said feeder.

### Claim 3 (depends on 1, 2)

Apparatus as defined by claim 1 or 2 wherein said guide means includes a portion having a longitudinal edge surface that is adapted to be disposed closely adjacent to the lower surface of the said stock in said feeder and to extend between the inner ends of said feed slides.

### Claim 4 (depends on 1, 2)

Apparatus as defined by claim 1 or 2 additionally comprising means for permitting vertical adjustment of the operative horizontal position of said edge surface relative to said feed slides.