Sheet guide positioning apparatus

An apparatus for positioning a pair of sheet guide means for guiding therebetween a conveyed sheet in sliding relationship to said sheet, comprising:

• means connected to said pair of sheet guides means for moving said pair of sheet guide means toward and away from each other so as to contact the sheet;
• rotatable screw rod means including portions having mutually opposite threads thereon;
• a pair of preset block means screwed onto said screw rod means such that said preset blocks are engaged with the corresponding opposite threads so as to move toward or away from each other along said screw rod means according to the direction in which said screw rod means is rotated, each said preset block means including at least a first positioning engagement portion;
• and
• means provided on each sheet guide means for positioning same at a desired position, said positioning means including engagement means engageable with and disengageable from said first positioning engagement portion on each preset block member.

Apparatus for relatively positioning a pair of sheet guide members for engaging a sheet-like workpiece passing therebetween comprising:

• means for moving said sheet guide members toward and away from each other to adjust the spacing therebetween;
• a pair of movable block members, each of said block members having at least one engaging portion;
• means for moving said block members toward and away from each other so as to adjust the spacing between said respective engaging portions;
• and
• means on said guide members for selectively engaging said engaging portions on said block members, respectively, whereby said guide members may be precisely repositioned by moving said block members to a predetermined position, and subsequently moving said sheet guide members until said engaging means contacts said engaging portion.