Apparatus and method for the heat treatment of yarn
US4513514A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 21, 1983 |
| Grant date | Apr 30, 1985 |
| Priority date | — |
| Expiry date | Apr 21, 2003 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF26B13/001
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An energy efficient apparatus and method for the continuous heat treatment of a carpet yarn or the like is disclosed, and which includes a conveyor extending through a heat treatment chamber, and with the conveyor comprising a number of endless belts which are adapted to support the yarn in downwardly hanging relaxed helically arranged loops. The lower portions of the loops are supportingly lifted during movement through each of the entrance and exit openings of the chamber, which permits the dimensions of the openings in the chamber to be minimized and thereby reduce heat loss therethrough. Also, exhaust enclosures are provided adjacent each of the entrance and exit openings to prevent the entry of outside room air through the openings and into the chamber, and means are provided for subjecting the lower portions of the loops to an extra application of heated air and steam within the chamber for neutralizing the possible cooling effect of any outside cool air which may move into the chamber through the lower portions of the entrance and exit openings. Means are provided for substantially uniformly circulating heated air and steam through all portions of the loops as they move thro…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.