GB1380959A - Apparatus for the automatic folding and creasing of sheet material - Google Patents

Abstract

1380959 Folding paper KALLE AG 20 April 1972 [22 April 1971] 18306/72 Heading B8R A sheet 2, Figs. 1 and 2, to be folded is fed by driven feed rollers 5, 6 to a drum 7 initially rotated counter-clockwise by an independent drive means, so that the leading end of the sheet is carried to the left to a photo-electric sensing device 15 which initiates a timing sequence as a result of which the drum drive is disconnected and the rollers 5, 6 are bodily pivoted to bring the roller 6 into contact with the drum, which it drives clockwise to draw the sheet to the right and form a fold between the drum and the roller 6, the folded part being carried to the right until the rollers 5, 6 are pivoted to bring the roller 5 into contact with the drum and drive it counter-clockwise to form a second fold. When the final fold has been made, the zigzag-folded sheet 2<SP>1</SP> is delivered along a guide 12 or guides 14, 12 to a receptacle 13. By selecting a timing circuit by an appropriate switch, the apparatus can be used to produce folds at irregular intervals according to various standard systems, in which case the last timing sequence, to form the last fold, is predetermined, or to produce folds at regular intervals, in which case the last sequence is determined by a photo-electric sensing device 17 detecting the trailing end of the sheet. Two sensing devices 15, 16 are provided, which are selectively operable according to the required position of the first fold.