Peter E Prader

US Patent:

51294354, Jul 14, 1992

Filed:

Nov 15, 1990

Appl. No.:

7/614247

Inventors:

Lauren J. Beuving - Redwood Valley CA
Peter E. Prader - Ukiah CA

Assignee:

Masonite Corporation - Chicago IL

International Classification:

B27N 700

US Classification:

144 2R

Abstract:

Apparatus for cutting discontinuous incisions into opposing surfaces of a fiberboard mat to condition it for molding into three dimensional panels, i. e. door panels, comprising a first pair of horizontal rollers comprising an upper roller and a lower roller with a gap between the two rollers; a second pair of horizontal rollers comprising an upper roller and a lower roller with a gap between the two rollers; the gaps defining a horizontal path along which a fiberboard can travel; each of the rollers having a multitude of sharp cutter blades capable of making discontinuous incisions in the adjoining surface of a fiberboard mat.

US Patent:

51799863, Jan 19, 1993

Filed:

May 19, 1992

Appl. No.:

7/886060

Inventors:

Lauren J. Beuving - Redwood Valley CA
Peter E. Prader - Ukiah CA

Assignee:

Masonite Corporation - DE

International Classification:

B27M 102
B27B 920

US Classification:

144362

Abstract:

A method of conditioning a fiberboard mat having upper and lower surfaces for molding it into a three dimensional object by making a first series of internally directed discontinuous incisions in the fiberboard mat upper and lower surfaces; making a second series of internally directed discontinuous incisions in areas of the fiber board mat upper and lower surfaces which contain the first series of incisions; and, desirably, with incisions of the second series being angled with respect to incisions of the first series.