Patent GB-786860-A (GB)
Title: A new or improved apparatus for assembling fabric covered buckles
Inventor: SPENDEL KURT
IPC: A44B11/00
Filed: 1955-02-28
Abstract: 786,860. Buckles. BERNING, O. and BERNING, R., [trading as BERNING & CO., O.]. Feb. 28, 1955, No. 5867/55. Class 43 Apparatus for assembling fabric-covered buckles of the type comprising two framelike members with rims of U-section which are adapted to be oppositely disposed and interengaged so that the overlapping edges of a piece of fabric arranged over the upper frame part can be clamped between the said two parts, comprises an upper tool Fig. 4, consisting of a holding-frame 10 having mounted for axial movement therein both a core 12 and an independently movable pressure frame 11 located between the members 10 and 12, and a co-operating lower tool comprising a base 22 supporting by means of interposed springs 23 an outer or holding-frame 21 which is connected rigidly to a central core 25, the space between the frame and core being occupied by a rigid counter-support or stop 24 upon which the lower part 2 of the buckle is placed. The adjacent upper edges 27 and 28 of the frame 21 and core 25 are bevelled, so that when the upper tool is lowered the downwardly extending borders of the covering fabric 7,.carried thereon with the upper frame part 1 of the buckle, are engaged by the bevelled edges and turned inwardly. Further lowering of the upper tool brings the inturned borders of the fabric 7 across the upper edges of the channels of the part 2 of the buckle frame until, in the final position and with the core 25 and frame 21 pressed down, in opposition to the springs 23, the edges of the inturned borders of the covering fabric are clamped between the buckle frame parts 1 and 2 as shown in Fig. 8. An auxiliary or loading-die is provided to effect a preliminary loading of the part 1 of the buckle frame and the covering fabric 7 into the upper tool, this being carried out with the upper tool in a relatively inverted position, Fig. 2, with the fabric 7 supported by the core 12 and the surface 13 of the holding-frame 10, the part 1 of the buckle frame being positioned on the fabric 7, as shown,. The loading-die comprises a plunger 17 carried by a mounting-plate 17a which is connected by pressure springs 18 to a frame 19 shaped to be received within the rim 14 of the inverted upper tool, the plunger 17 being provided with peripheral pressure ribs 20 directed upon the space between the parts 10 and 12 of the upper tool. Operation of the loading-die puts the buckle frame part 1 and covering-fabric 7 in the relativepositions in the upper tool as shown in Fig. 4. Since it is necessary for the upper tool tobe inverted each time it is to be loaded with a covering fabric and upper buckle part 1 two adjacent screw-presses are preferably employed, Fig. 9 (not shown) one press having an auxiliary or loading-die secured at the lower end of its pressing- screw, and the other having a lower tool with frame 21, Fig. 4, mounted on its base, each press having a holder to receive the upper tool which is inserted in them alternately. To facilitate the necessary folding of the covering fabric 7 it is shaped as shown in Fig. 1, with a central longitudinal slot 8 and end cuts -9 at 90 degrees to one another for arrangement over the upper part 1 of a buckle frame. In order that a pivoted prong may be attached to the buckle a shaped recess 29 is provided in the core of the lower tool.