GB181207A - An improved bookbinders' press - Google Patents

Abstract

181,207. Murray, J. April 30, 1921. Bookbinding-presses.-In a bookbinders' press of the kind having a fixed head and movable platen and alternative means for advancing the platen rapidly and slowly, means controlled by the pressure exerted between the platen and the head are provided for automatically operating the control of the platen motions. T h e platen G carried in guides on the table A is provided with a vertical handle J for the rapid advancing and retiring motion, and carries a rack bar K operated by gearing from a shaft N and handle P for the slow and pressure-applying motion. Planetary pinions R, S are supported from the central web of a casing Y attached to the shaft N. The pinions S engage a pinion V<2> fixed to a sleeve M having on it the pinion L meshing with the rack K, and the pinions R engage a pinion V<1> attached to a ratchet-wheel A<1>. A fixed head B at the end of the table has a face-plate C resiliently maintained at a short distance in front of it by a spring D arranged in a cavity in the head and engaging a plunger E. The material to be pressed is placed on the table against the faceplate, and the platen is run rapidly forward so that its impact causes the face-plate to retire, thus giving a horizontal motion to a tappet rod C' having a slotted link at its end which imparts a vertical movement to a pawl B<1>, causing it to engage the ratchet-wheel A<1>. On turning the handle P, the casing Y and pinions V<2>, L revolve and the rack K is fed forward. The pawl is disengaged when necessary by a handle H' on the tappet rod, and the platen can then be withdrawn rapidly.