Endless belt folder
AssigneePratt Manufacturing Corporation
InventorJohn F. Beaudoin
Life of this patent
Estimating the term…
Abstract
Folding apparatus includes an endless grooved belt mounted for movement along a linear folding path opposite a second endless belt which is V-shaped in cross-section for coaction with the groove of the grooved belt to thereby create a fold in sheet material therebetween.
Claims9
Folding apparatus for sheet material comprising a first endless belt having an exposed sheet-engaging face with a permanent groove therein, a narrow second endless belt having an exposed sheet-engaging face with a permanent longitudinal ridge, and means for mounting said belts for conjoint movement with portions of said exposed faces in longitudinal linear engagement along a linear folding path, with the ridge of the second belt in interfitting engagement with the groove of the first belt to receive flat sheet material therebetween for folding of opposite sides of the sheet material toward each other, the groove of the first belt being a substantial depth and the ridge of the second belt projecting a substantial distance into said groove, and said ridge and groove being sized and shaped relative to one another to cause partial folding of said opposite sides of the sheet toward each other on opposite sides of said narrow second belt and means for completing said folding.
Dependencies are inferred from the claim text.