Needle bar for a tufting machine
US4170949A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 7, 1978 |
| Grant date | Oct 16, 1979 |
| Priority date | — |
| Expiry date | Mar 7, 1998 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD05C15/20
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A needle bar for a tufting machine, comprising a main bar having a row of holes uniformly spaced at a coarse pitch, a multiplicity of contiguous segments fitted into a longitudinal location groove in one face of the main bar, each segment having a peg accommodated in one of said holes in the main bar and retained therein by a locking screw and a row of finer holes, disposed parallel to the holes in the main bar and uniformly spaced at a finer pitch than the holes in the main bar, and needles mounted in groups in the holes in the segments to extend away from the main bar and retained in said holes by locking screws, the number of needles in each group being equal. The conventional needle bar for a tufting machine consists of a massive bar, of rectangular cross section, conveniently 1" square, which is reciprocated vertically by push rods and is formed, at uniform pitch, with vertical throughgoing holes into which the shanks of the needles are fitted and secured in position by screws fitted into horizontally extending throughgoing holes in the bar. Difficulty arises, however, in the manufacture of the needle bar when the gauge of the machine, i.e. the spacing between adjacent needles…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.