US2769289A - Sharpening device for food slicing machines - Google Patents

Description

1956 J. GILBERT ET AL 2,769,289

SHARPENING DEVICE FOR Fon sucmc MACHINES Filed Sept. 9, 1955 III/[1111A /7IIIII Ila-"mks Jack 6/: 25 t '47 72mm ,g; -A I l I I I I ilk United States Patent A SHARPENING DEVICE FOR FOOD SLICING MACHINES Jack Gilbert, Newburgh, and Harry Preble, Jr., Cross River, N. Y., assignors to General Slicing Machine Co., Inc., Walden, N. Y., a corporation of New York Application September 9, 1955, Serial No. 533,416

4 Claims. (Cl. 51-248) The present invention relates to a sharpening device for the blade of a food slicing machine and more particularly to the type which is carried on the machine, manually manipulated from non-use to use position and having a spring means to restore it to its normal non-use position after release of manual hold.

An object of this invention is to provide a food slicing machine with a novel and improved blade sharpening device, which is easily mounted on and just as easily detachable from the machine.

Another object hereof is to provide such a sharpening device of novel and improved construction, which utilizes the mentioned spring to hold it mounted on the machine and it is by manual manipulation of this spring that said device is rendered detachable from the machine.

A further object hereof is to provide a slicing machine with a sharpening device which is hidden from view, except for an exposed element which is manually shifted to operate same.

Another object is to provide a novel and improved slicing machine and blade sharpener therefor of the type set forth, which is reasonably cheap to manufacture, easy to use and eflicient in carrying out the purposes for which such apparatus is designed.

Other objects and advantages will become apparent as this disclosure proceeds.

In the accompanying drawings forming part of this specification, similar characters of reference indicate corresponding parts in all the views.

Fig. 1 is a perspective view of a food slicing machine provided with a blade sharpening device in accordance with the teachings of this invention.

Fig. 2 is an enlarged fragmentary bottom view of the slicing machine of Fig. 1, showing the sharpening device in normal non-use position.

Fig. 3 is a section taken at lines 3-3 in Fig. 2.

Fig. 4 is a section taken at lines 4-4 in Fig. 2.

In the drawings, the numeral 15 designates generally a food slicing machine having a rotatable disc 16 as its cutting blade. In order that the sharpening means 17 shall be hidden from view as it is preferred to be, it may be housed in a suitable cavity 18 open upwardly from the bottom surface of the base frame part 19 of said machine. In fact such base may have a downward skirt or flange 19', at least part Way around its perimeter in order to provide housing space for the sharpening means 17, below the top panel 19" of said base frame part. The blade 16 is so mounted on the frame of the machine, that its bottom portion is below the panel 19" and free to be contacted by the sharpening member which may -be a rotatable wheel Patented Nov. 6, 1956 "ice 21 to rest on. It is practical that said arm shall be part of a bell-crank 23, whose other arm 24 extends to the flange 19' where it contacts an operating element or button 25 which is a double-headed shank, slidably mounted through an appropriate hole in the flange 19. In fact such button may even be a part of the bell-crank 23, provided head 25' is omitted or removable, so as to permit the mounting and removal of the sharpening means 17 as a unitary structure, which is the preferred embodiment. In any event, the protuberance 25" acts as a stop to limit the movement of the sharpening wheel 20 away from the blade 16.

Of importance to note, is the triple function of the wire spring 26. First it holds the bell-crank 23 from slipping 01f the pin 22. Secondly, it presses said bell-crank against the shoulder 22' to attain good bearing, and thirdly, said spring serves to return the bellcrank to its initial rest position so that the sharpening wheel 20 moves away from the blade 16, after hold is released of the button 25.

As mentioned, said spring 26 is made preferably of wire. One of its ends is anchored to the frame of the machine 15, which may be by having one end of said spring bent and positioned within the anchoring hole 27. The other end of said spring is bent into a hook form 28 in order to straddle the arm 21 at a point intermediate the sharpening wheel 20 and the pivot pin 22. Said spring 26 is flexed by its intermediate coil form whereby arm 21 is held away from the blade 16 so that the sharpening wheel is out of contact from said blade. The free portion of said spring, meaning the part thereof indicated by the numeral 29, is flexed to urge the bell crank 23 against the seat offered it by the shoulder 22. The intermediate coil form in said spring, denoted by the numeral 30, is about the boss 31 in which the axis pin 22 is set, in the embodiment illustrated.

When the sharpening device 17 is off the pin 22, the spring 26 will assume the position indicated by the dotted lines 26 in Figs. 2 and 3.

The simplicity of the structure of the sharpening means taught herein and the ease of its assembly, offer economy in the cost of manufacture. The bell-crank 23 being a simple metal stamping of little cost, it may be discarded,

with a worn sharpening wheel, and a new assembly 17 easily installed.

This invention is capable of numerous forms and various applications without departing from the essential features herein disclosed. It is therefore intended and desired that the embodiment shown herein shall be deemed illustrative and not restrictive and that the patent shall cover all patentable novelty herein set forth; reference being had to the following claims rather than to the specific description herein to indicate the scope of this invention.

We claim:

1. In a sharpening device for the cutting edge of a blade which is movably mounted on a frame, an axis pin extending from the frame, a wire spring anchored on said pin and extending therefrom; the free end of said spring being in the form of a book, an arm pivotally mounted on said pin and being capable of sliding on and off said pin,

. a blade-sharpening element carried on said arm away from said pin; said hook extending away from said pin in the direction of the sharpening element and engaging said arm; said spring being'biased whereby it presses the arm towards the part of the frame said pin extends fromand urges said am and sharpening element away from the blade, means on the frame, acting as a stop to limit the movement of the arm away from the blade and an operatthe sharpening element; said spring being biased whereby when said arm is removed from the pin and disengaged from said hook, said hook will assume a position further away from the blade and towards the part of the frame said pin extends from.

2. In the device as defined in claim 1, wherein the mentioned arm rests on a seat around the pin; the spring being biased to press said arm against said seat.

3. The device as defined in claim 1, wherein the said arm is part of a bell-crank; the second arm of which bell crank constitutes the member to be shifted for movement of the sharpening element towards the blade.

4. The device as defined in claim 1, wherein the pin,

spring, arm and sharpening member are covered by the frame and wherein the operating member extends through such frame to be accessible for manual manipulation.

References Cited in the file of this patent UNITED STATES PATENTS 1,338,478 Zawistowski Apr. 27, 1920 2,414,152 Jackson Jan. 14, 1947 2,580,531 Driskill Jan. 1, 1952 2,621,454 Callahan Dec. 16, 1952 2,715,305 Brown Aug. 16, 1955

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