Patent GB-276917-A (GB)
Title: Improvements relating to slicing machines
IPC: B26D7/06
Filed: 1927-04-21
Abstract: 276,917. Maatschappij tot Vervaardiging van Snijmachines Volgens van Berkel's Patent en van Andere Werktuigen, and Duyn, A. van. April 21, 1927. Cutting slices in succcssion. - In a slicing-machine the carrier for the substance to be sliced (or the carrier of the knife) actuates automatically in its working stroke, the feed-mechanism of the machine in such manner that equal feed movements are transmitted to the substance in spite of any variation of the points of commencement and termination of the strokes of the carrier, and without the necessity for adjusting any of the working parts to suit such variation. As shown in Fig. 1, the invention is applied to a reciprocating table machine, the table 2 being guided on bars 3, 4. A sleeve 16 is slidable on the bar 3 and is looked thereon intermittently by a collar 19, loosely hinged on an extension of the sleeve 16 and provided with edges shaped to bite into the guide bar 3 when acted upon by the spring 20. The sleeve 16 is connected by link 15 to a pawl lever 14 associated with the ratchet wheel 12 on the feed screw 10. In operation, the table 2 is reciprocated by the handle 6, and, during its initial movement towards the knife 1, the sleeve 16 is looked on the bar 2 and the feed mechanism is actuated. The adjustable abutment 23 then contacts with and releases the collar 19 whereupon the sleeve 16 travels with the table and feeding ceases. On the reverse stroke, the sleeve 16 becomes locked and returns the ratchet pawl for another feeding stroke whereupon it is unlocked and returned by a lug 22 on the table contacting with a lug 21 on the sleeve 16. At the commencement of the cutting stroke the spring 20 locks the collar 10 and the sleeve 16 is again fixed. The abutment 23 is adjusted by a pivoted lever 25 which works over a graduated scale. The collar 19 may be positively released on the reverse stroke by a member 31 engaging an extension 30 on the collar. As shown in Fig. 5, the invention is applied to an oscillating knife machine, the knife being carried on an arm 42 pivoted on a frame 45. An arm 42<1> is carried by the pivot shaft and carries an adjustable abutment screw 63 which engages and releases a collar 59 associated, as in the previous modification, with a sleeve 56 slidable on a bar 43 which may be arcuate. The sleeve 50 is connected with the feed ratchet 53 by linkage 54, 54<1>, 74, 75, 73, 55, 72. During the initial stage of the cutting swing, the sleeve 56 is stationary and feed is effected. During the feeding, the pivot pin 55 comes into alignment with the pivot shaft, and, the stop then actuates the collar 59 against the spring 60 and the sleeve 56 moves with the arm 42, the feed thus ceasing. On the return stroke, the sleeve 56 becomes locked and returns the ratchet pawl for another feeding stroke, whereupon a striker 71 on the arm 42 contacts with a tail piece 70 on the collar after which the sleeve returns with the arm 42. In both modifications, an adjustable shroud for the ratchet wheel may be used for slice thickness regulation instead of the adjustable abutments.