Crank 1 rotates about fixed axis A. Rocker arm 3 of four-bar linkage ABCD oscillates about fixed axis D and carries pawl a connected to it by turning pair E. Cam 10, rigidly attached to crank 1, oscillates rocker arm 7 of four-bar linkage FGKH. Link 5 turns about fixed axis L and has pin b which slides along slot d of lever 6, thereby turning this lever about fixed axis M. The feeding of the paper is regulated by ratchet wheel 4 which is driven by crank 1, mounted on the main shaft of the stacker, through connecting rod 2 and rocker arm 3 with pawl a. If the stack of paper is too low, link 5 with the feeler turns and deviates lever 6 so that lever 7 turns downward and pawl a of link 3 engages ratchet wheel 4 which actuates the mechanism for elevating the platform with the stack of paper (the platform elevating mechanism is not shown). Link 7 is raised, engaging paper feed, by links 8 and 9 which are actuated by cam 10 mounted on the main shaft of the stacker. Link 6 is returned to its initial position by spring 11.
$1730$LC,FD$