Patent GB-190713726-A (GB)
Title: Improvements in Machines for Crimping and Clamping or Shaping Leather or the like in the Manufacture of Purse Bodies and similar Articles.
Inventor: ALBRIGHT CHESTER EBEN
Filed: 1907-06-13
Granted: 1908-05-07
Abstract: 13,726. Albright, C. E. June 13. Purses.-A hand-operated machine for forming or crimping leather, fabric, &c., and particularly for forming purse or pocket-book blanks, comprises essentially (1) a yielding bed-plate D<2>, on which the blank to be formed is placed, situated in a hole in the table B of the machine and limited in its movements by a guide and stops ; (2) a detachable form R, held by a snap fastening P<2> in the upper part of the machine, movable in guides and operated by a hand-lever C<5>, and consisting essentially of two plates R, T between which the material is clamped ; and (3) crimping-plates operated by a foot-lever and moving in guides on the table of the machine, for forcing the material into a channel between the said two plates of the form. The bed-plate D<2> passes through a rectangular hole B<1> in the table B, and is fixed by a collar D<1> on the shaft D, the lower part of which is provided with a fixed collar D' having arms to which are attached springs. H attached at their other ends to the frame, for the purpose of keeping the bed-plate normally flush with the table. The vertical movement of the bed-plate is limited by collars or stops E, F, Figs. 1 and 17, which are fixed on the shaft and come into contact with the bar A' of the frame ; rotation of the bed-plate is prevented by an arm G'.pivoted to the collar F and passing through a bar a on the frame. The form is rectangular, and it consists of two plates R having curved rims R' and bolts U, and a flanged rectangular plate T, with holes T<2> through which the bolts and nuts freely pass, a central hole through which freely passes the notched peg S<3> of the rectangular plate S having transverse bearing-ribs S<1>, and holes S<2> through which pass the bolts. The plates T, R, S are held together by the bolts by means of a bar V, Figs. 5 and 6, and the complete form is held on the machine by the peg S<3>, having a certain amount of vertical play with respect to the plates R, T, by means of the snap fastenings P<2>, Figs. 1 and 6, fixed to a movable head or frame C<1> reciprocated by vertical bars C guided by the frame and connected at their lower ends to a bar C<2> and operated by a quadrant lever C<5>. The head C', Fig. 1, has two outer holes K provided with rods N, and springs N<5>, the tension of which is regulated by fixed stops ; two inner holes L, through which pass box-spanners O<1> operated by hand-wheels 0' for the purpose of tightening the bolts U of the form ; and a central hole M for holding the snap fastening. The rods N<2> are connected at their lower ends to a frame N, Figs. 1, 5, and 6, provided with lugs N<1>, which yieldingly press the form down during the crimping operations. The crimping is effected by means of L-shaped crimping-plates Q, Figs. 5 and 6, having tapered overlapping edges Q<1> and driven by holders W<3>, diagonally disposed and guided on the table, and having racks driven by segmental gears I connected to rods P, which are fixed at their lower ends to four arms I<3> radiating from a sleeve sliding on the shaft D and provided with pins I<5>, to which are attached springs J, connected at their upper ends to the frame and normally maintaining the holders or slides W<3> in their inoperative positions. The sleeve to which the rods I<2> are connected is lowered by means of the footlever I<8>, to which it is connected. The spaces between the crimping-plates Q, Fig. 5, are filled by adjustable wedges. A modification of the snap fastening, Fig. 18, has a disk P<4> rotatable on an axis by a hand-lever P<5> moving the jaws P<7> apart by means of pins P<6> on the disk. The action of the machine is as follows. A rectangular blank of leather is placed on the bed-plate in the opening of the table, and the form-holding mechanism is lowered upon it by means of the quadrant lever. This presses the central part of the leather on the yielding bed-plate through the opening in the table, and the edges of the material are thus turned up and yieldingly held by means of the tension plate N. The slides are next operated by means of the footlever, and force the crimping-plates Q and the material Y<1> into the channel space between the plates R, T, as shown in Fig. 6. The box-spanners are then operated to clamp the plates R, T. The form is finally unclamped and removed from the head C, and the locking-bar V is removed ; the finished blank, as shown in Figs. 10 and 11, can then be removed for further operations and fresh forms or blanks inserted in the machine.