Injector structure for liquid additives
US6182685A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 17, 1999 |
| Grant date | Feb 6, 2001 |
| Priority date | — |
| Expiry date | Mar 17, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7036
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An injector structure is disclosed for delivering liquid additives, and particularly colorants, into a polyester production system capable of being cleaned without removal from a production line. The device includes a valve body with an internal channel extending longitudinally therein, a hollow housing for receiving a reciprocating stem, and an insulating jacket for minimizing the affect that heat from a melt extruder may have on the liquid colorant as the liquid colorant flows through the injector. A fluid inlet in communication with the internal channel is provided for delivering fluid from an external source to the valve body. The reciprocating stem, in an open position, allows liquid colorant to flow from the fluid inlet through the internal channel and out of a discharge opening at one end of the valve body. In a closed position, the reciprocating stem blocks the internal channel thereby preventing delivery of the fluid from the fluid inlet to the discharge opening. By reciprocating the stem within the internal channel, any obstructing matter is loosened, thereby allowing an uninterrupted flow of liquid colorant through the injector structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.