US2110799A - Grater - Google Patents

Description

March s, 1938. 9 F. A. HENSCHELL 2,110,799

GRATER Filed April 20, 1932 A. y

lo wwwa ATTOR N EY Patented Mar. 8, 1938 "PATE GRATER Ferdinand A. Henschell, Vancouver, British Columbia, Canada, assignor to Rapid Mfg. Co.,

Inc., Seattle, 'Wash.

Application April 20, 1932, Serial No. 606,430

1 Claim.

The object of the invention is to provide a grater in which the grating elements are so formed with respect to the body that there is a true grating action, as contradistinguished from a shredding action, when a condiment, fruit or vegetable is moved back and forth over the grating surface; to provide a grater so formed that the perforations through which the grated material passes in the grating operation may be readily cleaned, so that the device may be kept in a sanitary condition without diiiculty; and to provide a grater which is of simple form and susceptible of cheap manufacture.

With this object in View, the invention consists in a construction and combination of parts of which a preferred embodiment is illustrated in the accompanying drawing but to which the invention is not to be restricted further than is imposed Vby any limitations appearing in the appended claim.

In the drawing:

Figure 1 is a plan view of a grater constructed in accordance with the invention.

Figure 2 is an edge elevational view.

Figure 3 is a sectional view on the plane indicated by the line 3-3 of Figure 1.

Figures 4 and 5 are detail sectional views off a specimen die and punch and showing the rst and second steps in the operation of forming the grating teeth.

The grater is constructed from a piece of sheet metal of which the body portion I0 is curled as indicated at il at the longitudinal edges, the terminal portions of which curls are flattened as indicated at i2, where the ends of the body sheet are turned on graceful curves as indicated at I4 and i4 to provide supporting feet which are formed by bending over the end edges of the body sheet as indicated at l5. The curve I4 is of less angular extent than the curve I4, so that when the device is placed on a flat surface the body portion lies at a downward inclination.y

The curls at the side edges strengthen the sheet against longitudinal distortion, as do the flattened and turned portions l5 provide reinforcements against transverse distortion.

The sheet is perforated as indicated at I6 and I1, the perforations it being arranged transversely of the sheet in pairs of rows, as are the perforations il, but the pairs of rows of perforations Il are staggered with respect to the pairs of perforations it. Thus the perforations are arranged in rows transversely of the sheetv but in staggered relation longitudinally of the sheet.

'Ihe material of the sheet is raised as indicated at I8 to provide grating teeth and these teeth are formed by punching the sheet, the die and punch used being of the general character shown in Figures 4 and 5. The die i9 has a iiat top face except in the region of the perforations for a portion of the peripheries of the latter, as indicated at 2t, the face at these points being depressed. The first step in the operation of punching the perforations consists in moving the punch 2i toward the die o-r block I9, when it cuts 10 the sheet i!) for approximately an angular distance of around the eye 22 of the die, for the depressed portion 2t of the block or die eX- tends this far around the perforation and the material is not severed directly above it in the 15 rst step. As the die moves downwardly, however, the material of the sheet or plate I0 is forced down against the depressed portion and when firmly seated on the latter, as indicated at 23, there can be no further movement or stretch- 0 ing of the material and the continued downward movement of the punch finally severs the disk 2d, so that there then remains pressed from the surface of the sheet lil the portion 23 of the material of the sheet which constitutes the grat- 25 ing teeth of which that edge facing the perforation is perpendicular to the face of the sheet and parallel to the axis 'of the perforation by reason of the punch clearance hole having its axis perpendicular to the axis of the face of the 30 die or block.

Obviously, gang punches are used for `forming the perforations and drawing out the teeth 23 and in order that the grater may function to accomplish the grating operation in either direction 5 of movement of the material thereover, the teeth 23 at the edges of the perforations in one row are oppositely disposed with respect to the perforations in the adjacent row, and the pairs ofy rows being arranged in staggered relation., the 40 teeth in one row, such as one of the rows il, catch the material that might have been missed due to the lateral spacing of the teeth in the rows I6, the teeth in these rows functioning correspondingly with respect to the teeth in the rows |1145 It will be noted that the teeth extend for approximately a distance of 180 around the peripheries of the perforations, so that the teeth at the ends first engage the material being grated before it is engaged by the intermediate portions 50 of the teeth. There is thus a much more eective grating action than if the cutting edgesl of the teeth extended in a straight line transversely of the body, where the full face or edge would be presented to the material at the same time. 55

By reason of forming the teeth in arcuate shape in partial bounding relatio-n to the perforations, the device is easily cleaned after use, as the perforations provide for its being freely flushed, so that any material left in the perforations may be readily driven out, or any left on the top face between the teeth readily flushed off.

On the top face of the lower curved portion I4,

perforations 24 and 25 are formed in corresponding relation to the relation of the perforations I6 and I7, grating teeth 26 being formed at the edges of the perforations 24 and 25, of correspending form and relation to the teeth 23.

The teeth 25 constitute grating teeth for nutmeg and the like for which the sizes of the perforations I6 and I1 are not readily adapted.

The invention having been described, What is claimed as new and useful is:

l. A grater comprising a. substantially plain perforated sheet having grating teeth arranged in partial bounding relation to its perforations, said teeth comprising bulged portions 0f the sheet which extend upwardly from the top surface thereof giving the teeth arcuate form in the plane of the sheet, the edge of that portion of the sheet constituting each tooth, being the Zone of `a cylindrical surface whose axis and the axis of the perforation lie in a common line perpendicular to the plane of the sheet,

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