Pile yarn feeding device in tufting machine

• US 4,856,441 A
• Filed: 02/08/1988
• Issued: 08/15/1989
• Est. Priority Date: 02/16/1987
• Status: Expired due to Term

• Current Assignee: Nakacawa Seisakusho Company Limited
• Original Assignee: Nakacawa Seisakusho Company Limited
• Inventors: Kurata, Yoshiharu
• Primary Examiner(s): NOT, DEFINED
• Application Number:
  US07/153,153
• Time in Patent Office: 554 Days
• Field of Search: 112/80.23, 112/80.54, 112/80.73
• US Class Current: 112/80.73
• CPC Class Codes: D05C 15/18 Thread feeding or tensioning arrangements

Abstract

A pile yarn feeding device in tufting machine comprising a plurality of rolls installed above and below the upper part of the tufting machine and rotated at a different speed to each other and some idler roll devices oppositely arranged against each of the rolls and having idler rolls advanced to and retracted from the rolls.

Claims

1. A pile yarn feeding device in a tufting machine comprising:

(a) a plurality of driving rollers in a vertical bank each driven at a different speed,

(b) pulling rollers for moving a plurality of horizontally spaced strands of pile yarn tangentially past said driving rollers,

(c) a vertical bank of a plurality of horizontally spaced individual pressure rollers independent of the pulling rollers positioned adjacent each strand of pile and each driving roller, the center of each pressure roller being slightly offset vertically from the center of each pressure roller to which it is adjacent, and

(d) projectable means mounting each pressure roller to move each pressure roller toward a driving roller to engage a pile strand between a pressure roller and a driving roller at an area slightly above the point of tangency of said strand and said driving roller to move the strand at a speed commensurate with the surface speed of a driving roller,

(e) said pressure rollers being advanced and retracted upon reception of a signal from a pattern control device.

2. A pile feeding device as defined in claim 1 in which said projectable means comprises a driving cylinder and a group of electromagnetic valves, and pattern control device operates said valves selectively in response to a signal produced from a computer storing a predetermined pattern.