Patent GB-430200-A (GB)
Title: Improvements in or relating to the manufacture of pocket bands containing upholstery springs
IPC: B68G9/00
Filed: 1934-05-02
Abstract: 430,200. Inserting upholstery springs in pockets. SPUHL, E., and SPUHL, J., 7, Lukasstrasse, St. Gallen, Switzerland. May 2, 1934, No. 13319. [Class 52 (iv)] [See also Group VII] In a machine for inserting compressed upholstery springs into a pocketed fabric strip the latter is fed intermittently past the spring - inserter by a conveyer the stroke of which is adjustable to suit different pocket widths. Regulating means are also provided to compensate for accidental misalignment of the pockets with the spring inserter. The machine works in conjunction with an intermittently operating spring coiling and inserting mechanism such as that of Specification 373,813, and the drive is derived therefrom by a shaft 13, Fig. 3, which together with a longitudinal cam shaft 5 geared thereto rotates once for every spring - inserting operation. The pocketed fabric 18 passes between guide plates carried by standards 41, 42, Fig. 3, opposite the spring inserter. Intermittently operating clamps 155, 156, Fig. 27 hold the strip while swinging levers 123, 165, 166, Figs. 16 and 23 open the pocket 168 and vertically pivoted feelers 70, 141, Figs. 3 and 27 swing into it to check its alignment with the inserter ; the spring is thereupon inserted and retained by pivoted lugs 169, Fig. 16. Feed.-The fabric is then clamped by spaced bars 84, Fig. 2, on a reciprocating carriage 27 which conveys it past the sewing- machine 170, Fig. 3. This latter is mounted on links 172, 176 and moves with the carriage at half its speed, deriding this motion from the carriage by co - operation of the rocking lever 187, connected to the link 172, with an inclined slide 189 on the carriage. The machine stitches the rear half of one pocket while travelling with the fabric and the forward half of the succeeding pocket when returning over the stationary fabric. By means of a link 238 and pawl and ratchet gear 207, 205, Fig. 3, the motion of the carriage is imparted to spiked feed chains 215, 227 which carry the filled pockets past a cam plate 237, Fig. 2 and a succession of rotary helices 252, 253, which serve to turn the spring in the pocket. Adjustment of feed.-The carriage 27 is actuated by a connecting rod 32, Fig. 5, operated by a cam 36 on the shaft 13 and its stroke can be varied by means of the slotted arm 37 on the cam follower. Regulation of feed.-Should misalignment occur between the pocket and inserter the pivoted feelers 70, 141, Figs. 2 and 27, swing the lever 154 on which they are mounted and vary the position of a pivoted arm 195, Figs. 3 and 5, a stop 196 on which engages one of a series of notches on a lever 33 to which the connecting rod 32 operating the carriage 27 is pivoted. The travel of the carriage imparted by the cam 36 is increased by the tilting of the lever 33 about the stop 196 and the sum of these motions is normally equal to the pocket width, any tilting of the arm 195 due to misalignment of the pocket axis will accordingly increase or diminish the succeeding travel of the carriage to correct the error.