Einar W Nilsson

US Patent:

44943946, Jan 22, 1985

Filed:

Jul 6, 1981

Appl. No.:

6/280372

Inventors:

Einar W. Nilsson - Bellefonte PA

International Classification:

B21D 304

US Classification:

72 98

Abstract:

A cross-roll straightener adapted to straighten round metal stock, wire, rods, bars and tubes by rotatingly advancing the stock through a central curved pass such that it is flexed beyond the yield point in a substantially uniform and gradual manner. A three pair roll arrangement provides uniform guidance and flexure while avoiding marking or collapsing of the stock.

US Patent:

47111127, Dec 8, 1987

Filed:

Oct 10, 1984

Appl. No.:

6/659087

Inventors:

Einar W. Nilsson - Bellefonte PA

International Classification:

B21D 304

US Classification:

72 98

Abstract:

A cross-roll straightener adapted to straighten round metal stock, wire, rods, bars and tubes by rotatingly advancing the stock through a central curved pass such that it is flexed beyond the yield point in a substantially uniform and gradual manner. A three pair roll arrangement provides uniform guidance and flexure while avoiding marking or collapsing of the stock. Also provided is a method for maintaining the stock in the pass line of a cross-roll straightener having a female roll of larger diameter than the male roll.

US Patent:

47635045, Aug 16, 1988

Filed:

Jul 23, 1987

Appl. No.:

7/076791

Inventors:

Einar W. Nilsson - Bellefonte PA

International Classification:

B21D 304

US Classification:

72 98

Abstract:

A cross-roll straightener adapted to straighten round metal stock, wire, rods, bars and tubes by rotatingly advancing the stock through a central curved pass such that it is flexed beyond the yield point in a substantially uniform and gradual manner. A three pair roll arrangement provides uniform guidance and flexure while avoiding marking or collapsing of the stock. Also provided is a method for maintaining the stock in the pass line of a cross-roll straightener having a female roll and a male roll of unequal diameters. In addition, positive guidance and considerably more capacity to straighten smaller stock sizes is obtained by providing adjustable outboard roll supports at each end of the basic six-roll straightener, thereby also reducing whipping of the stock.