# US 4,393,736 A · Cutter for a moving strand

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

- Number: US 4,393,736 A
- Document ID: US4393736A
- Status: Granted
- Kind: A
- Application number: 06/252,720
- Filed: 1981-04-10
- Granted: 1983-07-19
- Earliest claimed: 1981-04-10
- Assignees: E. I. Du Pont de Nemours and Company
- Inventors: Thomas R. Clark; Alvin E. Lillmars; Elwood A. Roth; Alvin L. Schmick; Maurice C. Todd
- Web page: https://patentgrep.com/patent/US4393736A

## CPC

- B23D 15/14: actuated by fluid or gas pressure
- Y10T 83/207: By suction means
- Y10T 83/8735: With means providing for plural steps in tool stroke
- Y10T 83/8752: Tool moves work to and against cooperating tool
- B23D: PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR (making toothed gears or the like B23F; cutting metal by applying heat locally B23K; arrangements for copying or controlling B23Q)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A cutting device used in conjunction with an apparatus for processing a continuously advancing strand material is actuated by an air cylinder that is preloaded to full pressure before moving the blade to cut the strand. An air activated linkage releases the cutting blade to begin its travel under full operating pressure.

## Claims

### Claim 1

In an apparatus for processing at least one continuous advancing strand, a cutting device for the strand comprising: a support situated adjacent the path of travel of the strand; a bed knife attached to said support and located below and across said path of travel; an arm positioned above the path of the strand for movement across the strand path to engagement with said bed knife; a linkage mechanism having a knee and being pivotally connected at one end to said support while the other end of the linkage mounts said arm for said movement; a first motive means coupled to said linkage for imparting said movement; a second motive means engageable with the knee of the linkage to hold the knee in an over-the-center position and limit movement of said arm to a location slightly above the strand path and then when energized, said second motive means moves the knee over center and allows said arm to complete its movement to engagement with said bed knife; means for removing the severed and continuously advancing strand located adjacent said bed knife; and a longitudinal member and mounting means between said longitudinal member and said support to allow transverse movement across the strand path above the strand removal means.

### Claim 2 (depends on 1)

The apparatus of claim 1, said first and second motive means being externally operated pneumatic cylinder.