GB157100A - Improvements in slow-down devices for registering sheets in sheet-feeding machines - Google Patents

Abstract

157,100. Christophel, C. E. Nov. 10, 1919, [Convention date]. Sheet-registering devices. - Automatic sheetfeeding machines are fitted with slowing-down devices, which also straighten the sheets prior to their being fed to front stops or the like, the devices comprising gauges mounted on reciprocating carriages moving on laterally spaced track-bars at a speed which is less than that of the sheet-forwarding mechanism. Two or more movable gauges 30 are mounted on carriages 21 reciprocated along track-bars 22 by means of oscillating arms 18, and connecting-rods 19, the arms 18 being on a transversely mounted shaft 14 oscillated bv cam-mechanism. The actual gauges 30 are flanges on a plate 29 secured to an arm 27 mounted on a pivot 20 and formed with a cam-arm 31 and roller 32 for controlling the position of the gauges. As the carriage 21 moves to the left in Fig. 2, the roller 32 engages an inclined cam surface 25<1> on a leaf spring 25 secured in a recess 23 in the bar 22 and is depressed thereby and by a corresponding incline on a guide-bar 26, so that the gauge engages an advancing sheet, and slows it down. As the several gauges move in unison, the sheet is eventually straightened by the action of the gauges. When the roller 32 reaches the end of the bar 26, it is raised by a spring 32<1> acting on a lever arm on shaft 20, and on the return motion it rides on the bar 26, the gauge being then above the sheet. During this return, the roller 32 presses on the spring 25 and forces it against the side of the recess 23.