Patent GB-176448-A (GB)
Title: Improvements in book-binding machinery
IPC: B42C5/02
Filed: 1920-11-10
Abstract: 176,448. Murray, J. Nov. 10, 1920. Bookbinding-machines.- In a rounding and jointing machine for shaping the backs of books in bookbinding, a jointing-roller is moved in an arcuate path conforming to, and with pressure upon, a rounded back of a book by means of a mechanically - operated linkage above and out of the path of the book. Prior to the action of the jointing-roller, the back of the book is rounded by rounding-rollers mounted in recesses in clamping-heads which grip the books during the jointing operation, these rollers being rotated and moved towards the book so that they project beyond the faces of the heads. Means are provided for conveying books into the machine, for elevating them one by one from the conveyer to a position between the clamping-heads where they are held with sides vertical and back horizontal during the rounding and jointing operations, and for discharging them from the machine on the conclusion of these operations. Means are also provided to adjust the machine for books of varying thickness so that the central plane of the book lies in the same position for all thicknesses. In the form shown, the jointing-roller B<11>, Fig. 1, is mounted on side links B<10> moved by adjustable crank or eccentric devices in the form of eccentric pins B<6>, B<7>, B<8> on rotatable discs B<3>, B<4>, B<5> mounted on horizontal shafts B, B<1>, B<2>. The links B<10> are pivoted to the pins B<7> and the pins B<6>, B<8> are connected by horizontal links B<20>, B<9> to the pins B' and intermediate points on the links B<10> respectively. The discs B<3>, B<4> are rotated by the engagement of pinions on the shafts B, B<@> with a. rack quadrant C<2> reciprocated by a rod C<3> pivoted to it and carrying a roller operated by a cam on the driving-shaft C' of the machine. The path of the roller B" may be adjusted by radial adjustment of some or all of the pins B<6>, B<@>, B<7> on the discs B<3>, B<4>, B<5>, each pin being mounted on a block which slides radially on the disc, which is adjusted by a spindle mounted on the disc having worm engagement with the block, and which is locked in position by a screwthreaded V-shaped wedge engaging a correspond ing recess in the block. The shafts B, B<1>, B<2> and quadrant C<2> are mounted in side-frames A<6> supported by pivoted links A, A<5> on a bracket A adjustable horizontally on the frame A<3> of the machine so as to adjust the central position of the roller B" to the centre of the book. The links A<4> are held in position by spring action, and the length of the links A<5> is varied, so as to raise or lower the roller B", by a double-screw coupling A<8> rotated by a rack A<9> operated by a lever D<5> controlled by a second cam on the shaft C<4>. The back of the book is rounded prior to the action of the roller B" by rollers J, J<1> mounted with their axes parallel to the sides of the book in recesses in hands E, E<1> which clamp the book during the jointing operation of the roller B<11>. The rollers J. J' may be adapted to deal with books of different substance and are moved into contact with the book by endways movement of bars J<20>, Fig. 8, provided with studs engaging diagonal slots in slide blocks J<2> carrying the rollers J. J<1>, this movement being produced from a spindle J<8> by means of cranks J<7> and links J<9>, springs J<13> being interposed between the sliders J<10> on the links J<9> and bosses J<12> on the band J<20> so that the rollers J, J, are forced against the books by spring action. The spindle J<8> is linked to a shaft K<20> reciprocated by a rack controlled by a cam on the shaft C<4>. The rollers J, J<1> are rotated by the engagement of pinions on their spindles with rack-bars J<15>, these bars J<15> having second racks engaged by pinions K on a shaft. K<9> rotated by a rack controlled by a cam on the shaft C'. On the conelusion of this rounding operation, the books are gripped between the heads E, E<1> by the motion of the head E' towards the stationary head E, this motion being produced by a toggle linkage E<2> acting between the head E<1> and an adjustable anchor-piece E<3> and operated by a link E' comprising a spring buffer device which gives under excess pressure, the lower end of the link E' being connected to a lever E<6> operated by a cam on the shaft C'. The books B<16> are fed into the machine by a conveyer device comprising a series of fixed horizontal rails G<5> on which the books rest and a series of horizontal rails G moved approximately elliptically and positioned so that they lift the books B<16> from, and move them forward on, the rails G<5> during part of their motion. The horizontal motion of the rails G is produced by a lever G<6> connected to the ends of the rails and having a tappet-roller G<7> operated by a cam on the shaft C'; whilst the vertical motion of the rails G is produced by cranks G<4> pivoted to the rails G<5>, engaging slots in the rails G, and reciprocated by links G<10> operated by a lever similar and similarly-controlled to the lever G<6>. The books are elevated one by one from the rails G<5> to a position between the heads E, E<1> by a rounded bar H operated from a cam on the shaft C<4> through multiplying-gearing comprising a lever H<12> reciprocated by the cam and carrying a pinion H<9> operating between a stationary rack H<10> and a rack H<8> connected to the bar H. The book is discharged from the heads E, E<1> by a finger M engaging the book and moving it horizontally on to a rail device for conveying the books away from the machine, the finger M being mounted on a rack bar M<1> guided horizontally in the head E and operated from a cam on the shaft C<4> through multiplying-gearing comprising a pinion M<2> on a vertical shaft M<10> rotated by a rack bar M<4> engaging a pinion M<3> on the shaft M<10> and connected to a cam-controlled lever M<7>. The cams on the shaft C' are so formed that the conveyer, the elevator, the rounding and jointing mechanism, and the discharging finger are operated in the correct sequence. The machine is adjusted for varying thicknesses of books by means of shafts P<1> at each side of the machine engaging screw-threaded bearings on the bracket A and the mounting E<12> of the head E<1>, the shafts P<1> being connected through pinions and worm-gearing to a transverse shaft N<1> rotated together with similar shafts adjusting other parts of the bookbinding-machinery for varying thicknesses of books or independently.