Patent GB-189503-A (GB)
Title: Improvements in machines for folding binding strips around the edges of materials such as boot or shoe uppers
IPC: A43D9/00
Filed: 1921-08-24
Abstract: 189,503. Stanley, A. H., (Beacon Folding Machine Co.). Aug. 24, 1921. Affixing by adhesives; tape, ribbon, and like strips, affixing.-In apparatus for folding a binding-strip around the edge of material such as a boot or shoe upper to which it is attached, means is provided for intermittently moving successive portions of the free edge of the strip across the connected edges of the strip and upper, folding over the strip and pulling it tight, and finally, pressing the folded parts against the face of the upper. The upper is placed on a platform 24, Fig. 30, and the free edge of the strip 2, Fig. 32, is initially moved around the edge 4 of the upper 6 into the space between a feed-point 30 and a plough 32 formed on a plate 34. The strip is then wiped tightly acros the edge 4 by the action of a wiper with which a retainer cooperates, the wiped portions are folded around the edge 4 by the plough, and are then gripped and pulled tight by the plough and the feed-point. The work is then advanced by the feed-point and a co-operating feed-block 41 to a fold-presser 42, Fig. 27, which presses down the fold on to the upper, as shown in Fig. 34. The wiper 38, Figs. 20 and 24, in its preferred form comprises a toothed member loosely mounted on a crank stem 31, which is obliquely secured to a rotary shaft 52, a cam shoulder 49, Fig. 15, on the wiper resting on a fixed lug 50. The wiper is thereby given an oscillating motion in a direction rearwardly oblique or diagonal to the strip and at an angle to the plane of the strip. The wiper shaft is driven through a ball-and-socket connection and an intermediate shaft from the driving- shaft 66, Fig. 1, which is provided with a flywheel 68 and is connected to a driving-pulley 74 by a pedal-operated clutch. The wiper may be in the form of a continually rotating disc having a raised rim, or a stationary finger or bar may be used. The modified wiper 602 shown in Fig. 40 is pivoted at one end to a link 606 and has a slot engaging a fixed pin 616. The link 606 is guided on a pin 612 and is reciprocated by a rotating gear 610. The feed-mechanism, comprising the feed-block 41, Fig. 30, and the feedpoint 30, which turns about a pivot 110, is carried by a rocking plate 94 in which slides a cylindrical block 102, Fig. 31, which is reciprocated by an eccentric pin 106 on the driving-shaft 66. The block 102 raises the feed-point against the action of a spring 112, so that the work is alternately gripped and released, the feed being effected by the rocking motion of the plate 94. During the return stroke of the feed-mechanism, the portions of the strip that have been wiped are given an initial fold by the plough 32. The descent of the feed-point then grips the strip against the plough and pulls it tight. The strip may be secured to the upper by previouslyapplied cement, a yielding separating-arm being provided to prevent the strip from engaging the upper until it has been pulled tight. Alternatively, the strip may be dry-cemented, and the fold-presser electrically heated, the temperature being kept constant by a thermostat. The upper is advanced under the diagonally-offset edge of the fold-presser by which the strip is pinched at the fold before being pressed on to the upper. The fold-presser 42, Fig. 27, is of cylindrical form, and is given a rocking movement in a cylindrical bearing 158, which is carried on a pivoted spring-pressed arm 160. The edge of the fold-presser is thereby caused to descend with a rolling action upon the strip, so as to iron it out from the free edge towards the edge 4. The retainer 153, Fig. 24, which holds down the upper during the wiping of the strip, is preferably of bowed form with a toothed point 246, and is provided with a stop-arm 250 to limit its descent. The retainer is carried by a hollow shaft 200 loosely mounted on a rocking shaft 198, the two shafts being connected by a spring. Alternatively, the retainer may be continually pressed against the upper by a spring. At concave parts of the work 174, Fig. 24, the strip is snipped by a knife so that it may lie smoothly. The knife 352, Fig. 1, co-operates with the separating-arm, and is carried by a bar 354 supported near one end by a pivoted link 356 and oscillated at the other end by an eccentric, which can be connected to a rotating gear 366 by a pedal-operated clutch. The speed of the machine can be varied by altering the pressure between the faces of the driving-clutch by means of the pedal.