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Патент USA US2110799

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‘March s, 1938.
Filed April 20, 1932 A. y
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Patented Mar. 8, 1938
Ferdinand A. Henschell, Vancouver, British Co
lumbia, Canada, assignor to Rapid Mfg. Co.,
Inc., Seattle, 'Wash.
Application April 20, 1932, Serial No. 606,430
1 Claim. (Cl. 146--180)
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
5 a shredding action, when a condiment, fruit or
vegetable is moved back and forth over the grat
ing surface; to provide a grater so formed that
the perforations through which the grated mate
rial passes in the grating operation may be readily
10 cleaned, so that the device may be kept in a
sanitary condition without diíiiculty; and to pro
vide a grater which is of simple form and sus
ceptible of cheap manufacture.
With this object in View, the invention con
15 sists 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 ap
20 pended 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 in
dicated 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 ñrst and
second steps in the operation of forming the
grating teeth.
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
ñrst step.
As the die moves downwardly, how
ever, 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-
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 per
foration 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
terminal portions of which curls are flattened as
and in order that the grater may function to ac
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
40 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
45 flattened and turned portions l5 provide rein
forcements against transverse distortion.
The sheet is perforated as indicated at I6 and
I1, the perforations it being arranged trans
versely of the sheet in pairs of rows, as are the
50 perforations il, but the pairs of rows of perfora
tions 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.
'I‘he material of the sheet is raised as indicated
ing of the material and the continued downward
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
indicated at i2, where the ends of the body sheet
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 in
dicated at 2t, the face at these points being de
pressed. 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 dis
tance of 180° around the eye 22 of the die, for
complish the grating operation in either direction
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 per
forations 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 correspond
ingly with respect to the teeth in the rows |1145
It will be noted that the teeth extend for ap
proximately 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 eñec
tive 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.
By reason of forming the teeth in arcuate shape
The invention having been described, What is
in partial bounding relatio-n to the perforations,
claimed as new and useful is:
the device is easily cleaned after use, as the per
that any material left in the perforations may
be readily driven out, or any left on the top face
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
between the teeth readily flushed off.
which extend upwardly from the top surface
forations provide for its being freely flushed, so
On the top face of the lower curved portion I4, ._ thereof giving the teeth arcuate form in the plane
perforations 24 and 25 are formed in correspond
10 ing 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 corre
spending form and relation to the teeth 23.
The teeth 25 constitute grating teeth for nut
15 meg and the like for which the sizes of the per
forations I6 and I1 are not readily adapted.
of the sheet, the edge of that portion of the sheet
constituting each tooth, being the Zone of `a cylin
drical 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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