GB766903A - Improvements in or relating to knife sharpening devices or appliances of or for slicing machines having rotary knives - Google Patents

Abstract

766,903. Sharpening machine cutters in situ. ASCO, Ltd. May 31, 1955 [June 3, 1954], No. 16380/54. Class 60. The rotary circular knife y of a slicing. machine is sharpened by two rotatable abrasive wheels 16, 17 carried by a mounting bracket 11 secured to the reduced upper end 10a of a vertical spindle 10 rotatable in a bracket x of the slicing machine. The wheel 16 for grinding the bevelled edge of the knife has a spindle 16a in a bearing sleeve 14 slidable in a sleeve portion 12 integral with the bracket 11; a helical spring 18 urges the wheel 16 to- .ward the knife. The wheel 17 for removing burr caused by the wheel 16 has a spindle 17a in a bearing sleeve 15slidable in a sleeve portion 13 integral with the .bracket 11; a compression spring 28 urges the wheel 17 toward the knife. A pin 19 extends from bearing sleeve 14 through a slot 12a of sleeve 12 and carries the boss 20a of a acrew-threaded link 20 carrying nuts 21, 22; between the nuts is located .the end 23a of an arm 23 pivoted at 24 to an extension of sleeve 13. A spring 25 is connected between the arm 23 and sleeve 13, and the arm 23 is engaged by a cam 34 on a cam sleeve 32 rotatable, by handle 33, on the reduced upper end 10a of spindle 10. The cam sleeve 32 also carries a cam 31 which acts through rocker arm 29, pivoted at 30 on bracket 11, on the end of spindle 17a of wheel 17. When handle 33 is placed in position "G", cam 34 allows the yoked end 23a of arm 23 to engage nut 22 on link 20 and grinding wheel 16 engages the knife under the combined influence of springs 18, 25; the cam 31 engages the rocker arm 29 to maintain the finishing wheel 17 clear of the knife. handle 33 is then placed in position F, wherein cam 31 is clear of rocker arm 29 so that finishing wheel 17 engages the knife under the influence of spring 28; cam 34 engages arm 23, so that grinding wheel 16 engages the knife under the pressure of spring 18 only, i.e. the pressure of the grinding wheel is reduced. When the handle 33 is placed in position "N", both wheels 16, 17 are retracted from the knife. The cam sleeve 32 may be biased toward the "N" position so that it is necessary for the operator to hold the lever in either of the operative positions.