Patent GB-191317305-A (GB)
Title: Improvements in Folding Machines.
Inventor: LAUTENSCHLAGER WILLIAM FREDERI
IPC: C14B11/00
Filed: 1913-07-28
Granted: 1914-07-09
Abstract: 17,305. Lautenschlager, W. F. July 28. Sheet material, finishing edges of.-Relates to means for actuating the feed-point, presserfoot, slitting-cutter, and edge-folder in a machine for folding the edges of leather, cloth &c. The feed-point 53 is carried by a shaft 57, which is housed in a member 56 and is reciprocated in its housing by a forked link 61 engaging a pin 59 on the shaft, and a returning-spring 57<a>. The link 61 is reciprocated by an arm 62 on a rock-shaft 11, which derives its movements from the main shaft 2, Figs. 7 and 8, by an eccentric 6 and connexions 8, 10. The housing - 56 is rocked to give the actual feeding movement by a rock-shaft 28 connected with the main shaft 2 by link-work which permits of the feed being varied at will by the operator. An eccentric 7 rocks a shaft 17 having an arm 19 connected by links 21, 24 with an arm 26 on the shaft 28. The position of the pivot 22 determines the amount of feed, and it is carried by a link 23 connected to an arm 32 of a boss 33 loosely mounted on the shaft 11. A spring holds a stop 102 against an adjustable pin 103, which determines the maximum feed for the time being. To reduce the feed, as required in folding convex edges, the pivot 22 is shifted inwards by pressing on the lever 100. A stop-screw 35 contacts with the shaft 28 to limit the movement in this direction. The underside of the material travels over a loosely-mounted wheel 42. The presser-foot 43, Fig. 1, is pivoted at 46, Fig. 2, and is held to its -work by a spring 45. It is lifted periodically for the feed by an arm 48 on the rock-shaft 11 engaging a spring cushion stop 49 on the arm 50. The foot may be raised by pressing on the hand-lever 44. An adjustable edge-guide is provided on the feed-member 57, and a. second guide on the work-plate. The folding-mechanism comprises a stationary block inclined to the machine table and an oscillating folder 66. A curved block 64 gives the initial turn-up to the edge of the material, which then passes into a slot 65 in the folder 66. The folder lever 66<a> is loosely mounted on a shaft 68, Fig. 11, and its arm 69 is actuated by an oscillating member 72 pivoted on the shaft 68. The folding stroke is imparted by a yielding spring connexion 71 with the arm 72, and the retracting stroke is made positively by a lug 72<c> contacting with a screw 69<a>. The arm 72<a> of the member 72 embraces and is actuated by a shaft 75, to which up-and-down movements are imparted by a link connexion 74 with an eccentric crank on the main shaft 2. When folding concave edges, it is desirable to slit the edges before folding. A cutter for this purpose comprises a stationary blade on the table of the machine, and an oscillating blade 88 secured to an arm 83. The cutter-actuating mechanism is so arranged that it may be set to be normally inoperative, the operator throwing it into operation by depressing a treadle; or it may be set to be normally operative, in which case depression of the treadle throws it out of operation. The lever 83 is oscillated from the vertically reciprocating shaft 75 by a link 76 embracing an eccentric 87 on the shaft. The shaft 75 is mounted in a block supported on the link 74. The operator determines whether the cutter shall be normally operative or inoperative by positioning the shaft 75 with its eccentric 87. The subsequent control of the cutter is obtained by a treadle rod 93<c> adapted to rock a pivoted lever 90 against the pull of a spring 99. A link 95, connecting the lever 90 with an arm on the shaft 75, rocks the shaft when the treadle is depressed. Stops 94, 94<b> are arranged to contact with the machine frame to limit the motion. The various parts are adjustably mounted where necessary.