US1985874A - Razor blade polishing and stropping machine - Google Patents

Description

Dec. 25, 1934. M. WLOKA RAZOR BLADE POLISHING AND STROPPING MACHINE Filed Oct. 10, 1930 2 Sheets -Sheet l fizbejzimk Dec. 25, 1934. Y M, WL-OKA 1,985,874

RAZOR BLADE POLISHING AND STROPPING MACHINE Filed Oct. 10 1950 2 Sheets-Sheet 2 (o MW 7 1 My 1 .fiwenfar;

Patented Dec. 25, 1934 MAORI Max was,

Application October 10, 1930, Serial No. 487,773

In Germany October 18, 1929 1: Claim. (Cl. 51- -84) This invention relates to a machine for polishing the cutting edges of double edged razor blades, in which two blades lie at the same time juxtaposed on a carriage of the machine with one edge projecting and, during the forward and return movements of the carriage these blades are guided past the polishing wheels of the machine, so that the projecting edge of the blades is polished on both sides. y

The machine according to the invention differs from the known machines of this type in that on a slide reciprocatable transversely over the carriage of the machine three spring loaded grippers are arranged which, when the carriage is in its initial position, are controlled by a rotary cam drum so that they successively lift the blades to be polished from the pile of blades, place the blades on the carriage of the machine first with one and then with the other edge projecting therefrom and after both edges of the blades have been polished, lift the blades oif the carriage and deposit same on guide pins at the side of the carriage. The blades are thus automatically guided through the machine by means of the grippers in such a mannerthat always two blades are on the carriage of the machine and are simultaneously polished on one edge, so that the polishing of the blades takes place rationally and the polished edges of the blades are not damaged.

An embodiment of the invention is illustrated by way of example in the accompanying drawings in which:

Fig. 1 shows the machine in front elevation. Fig. 2 is a side elevation of Fig. 1. Fig. 3 shows in top plan view the blades in position on the carriage.

Fig. 4 is a part elevation looking from the right.

of line IV--IV- of Fig. 1. v

On the frame 1 of the machine two mutually adjustable bearing carriages 2 and 3 are mounted which each carry two vertically adjustable bearings 4, 5 and 6, '7 with axles 8, 9 and 10, 11. The bearings 4, 5 and 6, 7 are adjusted vertically by means of two handles arranged on the top of the 7 28 engages in the toothed rim 29 on one end of the cam drum 24, which spur wheel is keyed on an axle 32 and driven by a belt drive 25 also from the main shaft 20. In a guide 26 the cam drum 27 of the machine is guided which carries a projection 30 engaging in a cam groove 31 in the cam drum 24 and thus is reciprocated during the rotation of the cam drum 24.; Above the carriage 2'7 a slide 34 is guided transversely to-the carriage 27 on a frame 33. An arm 35 oscillatably mounted at 36 is mounted on its upper end on the slide 34, its lower end carrying a roller37, engaging a projection 48 on the end of the cam drum 24 re- 41 of the frame 33 three arms 42, 43, 44 as also a lever 46 are fixed. The lever 46 carrying a roller 47 is situated at the side of the cam drum 24.

The blades to be polished are placed with their outer holes over guide pins 50 on a plate 51 which is arranged on a frame 52 of the slide 27 preferably so that it is shifted upwards a distance corresponding to the thickness of a blade, each time a blade is removed from the pile so that the uppermost blade is always situated at the same height. This may be effected by a vertical screw spindle whichis periodically rotated by any suitable means. For example the plate 51 may be providedwith a: screw spindle with a toothed wheel mounted thereon in which a pawl engages which is actuated by the arm 35. In the initial position of the carriage 27 the gripper 38 comes above the blades piled up at 50 and the grippers 39 and 40 aresituated above the longitudinal edges of the carriage 27. When the carriage 27 is in this position, the projection 48 on the cam drum 24 strikes against the roller 47 of the arm 46, so that the grippers 38, 39 and 40 are pressed downwards. a

At the same time the grippers 38, 39 and 40 are influenced by suction with the result that the v gripper 38 lifts the blade lying uppermost at 50 and the grippers 39 and the blades already on the carriage 27 of which one blade is already polished on one edge and the other on both edges. As soon as the grippers have lifted the blades, the slide 34 is shifted by the arm 35 so that the gripper 38 comes above one longitudinal edge, the gripper 39 above the oppositelongitudinal edge and the gripper 40 above the depositing point, that is the guide pins 53. At this movement the suction eifect of the grippers 38, 39, 40 is removed with the result that the blade lifted off the pins at 50 by the gripper 38 drops over the guide cam of one longitudinal edge of the carriage, the blade already polished on one edge and lifted from this point by the gripper 39 drops over the guide calm of the other longitudinal edge of the carriage and the blade already polished on both edges and lifted from this last mentioned point by the gripper 40 drops over the guide pins nation a laterally reciprocating carriage, two

' blade holders arranged side by side on said carriage, a slide adapted. to transversely slide on said carriage two pairs of rotary tools, one pair on each side of said carriage and adapted to work the two sides of one edge of each of the blades in said blade holders during the reciprocation of said carriage, three suction grippers mounted on said slide; and a -cam "drum adapted to jointly control said grippers to simultaneously shift three blades, each blade being successively taken up from a pile of blades on one side of said carriage placed first on oneand; then on the other of said blade .holders and finally deposited at the other side of said carriage.

' MAX WLOKA.

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