Patent Number: 6,254,363

Title: Liquid colorant tube assembly

Abstract: A liquid colorant system for a plastic molding machine includes a plurality of interconnected tube structures, a tank containing the liquid colorant, and a peristaltic pump. The pump drives a flow of the liquid colorant from the tank to a valve through a delivery tube and a peristaltic tube. During ordinary operation, the valve allows the liquid colorant to flow into the molding machine through a feed tube. However, the valve can be shifted to allow air to be purged through a purge tube, bypassing the feed tube and the machine.

Inventors: Fink; James Allen (Bay Village, OH)

Assignee: M. A. HannaColor, a division of M. A. Hanna Company

International Classification: B29B 7/94 (20060101); B29B 7/00 (20060101); B29C 45/18 (20060101); F04B 43/12 (20060101); F04B 53/00 (20060101); F04B 53/06 (20060101); B01F 15/00 (20060101); F04B 053/06 ()

Expiration Date: 07/03/2018