Apparatus for shifting tufting machine needle bar
US4285287A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 11, 1980 |
| Grant date | Aug 25, 1981 |
| Priority date | — |
| Expiry date | Sep 11, 2000 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD05C15/30
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A tufting machine having a needle bar shifter apparatus including a follower member operatively connected to the needle bar and positioned within a guideway tiltable about both a lower pivot and an upper pivot. External force applied by positioner devices is selectively applied to pivot the top of the guideway about the lower pivot while the needle bar and follower member are in a lower position with a follower substantially aligned axially with the lower pivot, and to pivot the guideway about the upper pivot when the needle bar and follower member are in an upper position substantially aligned with the upper pivot point. The guideway is pivotably connected to control rods driven by the positioner devices. The momentum of the reciprocating needle bar provides a substantial amount of the force required for a lateral shift, and only small external force need be applied to the control rods.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.