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Патент USA US2131368

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Sept. 27,‘ 1938.
J. M. BOWEN‘
.
,
2,131,368
PROTECTED BLADE'
Filed April 27, 1937
E1594‘
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iNVENTOR
BY
371.83%
Patented Sept. 27, 1938
.
moms STATES
ATENT OFFICE
2,131,368
PROTECTED BLADE
Joseph M. Bowen, West Quincy, Mass, assignor
to Gillette Safety Razor Company, Boston,
Mass, a corporation of Delaware
Application April 2'7, 1937, Serial No. 139,264
5 Claims. (01. 206—46)
This invention relates to the packaging'of fine ends may be located centrally and symmetrically
edged blades, such for example as safety razor
blades. In one aspect it consists in an end
notched or recessed blade protected by a wrapper
5 of sheet material and positively held therein
against displacement by being interlocked with
the wrapper. A protected blade of this general
type is disclosed and claimed in my priorappli~
cation, Ser. No. 101,281, ?led September 17, 1936'.
or they may be offset toward one edge or the
other of the blade according to the design of
the blade to be wrapped, and in each' case the I
neck orreduced portion of the end tabs of the 5
wrapper will be correspondingly located.
An important advantage of the present inven
tion is that it may be applied with equal facility
to the wrapping of single edged bladesor double
1,0 In another aspect the present invention consists
edged blades.
in the adaptation of the broad principle of my
earlier invention to the wrapping of blades having a recess provided at any point between their
end corners.
15
In handling safety razor blades under commer-
These and other features of the invention will
be best understoodand appreciated‘from the fol
lowing description of a preferred embodiment
thereof, selected for purposes of illustration and
shown in the accompanying drawing, in which:—I- 15
cial conditions of transportation and distribution
Figs. 1, 2 and 3 illustrate successive steps in the
and in the morev or less casual treatment of such
wrapping of a double edged blade having cen
blades by the user, the extremely ?ne, keen edge
trally located end recesses;
of the blade is likely to become dulled by being
g0
7
rought into contact with its wrapping either at
10
Figs. 4, 5 and 6 illustrate similar steps in wrap- ,
ping a single edged blade having non-symmetri- 20
a fold vertex or by being drawn across or cutting
the wrapper in being removed therefrom. On
cally located end recesses;
Fig. 7 is a fragmentary view in perspective ~
this account the best and most skillful efforts of
the manufacturer in sharpening blades are often
PD in brought to naught because of the damage done
to the fragile and delicate structure of the blade
edge after it has been brought to the keenest
showing one end of the blade in‘ Figs. 2 and 3 in
position upon its wrapper but before the end tab
is folded over the end of the blade.
‘
The wrapper blank, which may be made of '
thin sheet material such as oiled or waxed paper
possible shaving condition and before the shaving
operation is actually undertaken.
With these conditions in view an important ob-
as shown in Fig. 1, comprises a rectangular body
portion iii scored to de?ne side ?aps H and [2
and end tabs or tongues l3. Each end tab I3
ject of the present invention is to provide a novel
wrapper in which an end notched blade may be
tapers outwardly and is provided, with a reduced I
portion or neck Ill and an enlargedv terminal
0
fully enclosed and held positively in such position that its cutting edge is protected at all times
from direct contact with the fold vertex lines of
the wrapper. I have discovered that the desired
results may be accomplished by shaping the end
tabs of the wrapper to present a neck or portion
of reduced width which may be passed through
40 or into the end cavities of the blade and so-interlocked with the blade that transverse shifting
thereof in the wrapper is positively prevented.
Then, by folding side flaps of the wrapper on
lines outside the sharp edge or edges of the blade,
45 the latter is held positively out of contact with
the adjacent fold vertex lines of the wrapper.
Preferably and as herein shown the reduced
portions or necks in the end tabs carry enlarged
ends or terminal portions which are substantially
DOTUOYE l5 haVing a sfqllare Cut end edge- In the
wrapper of Fig. l the reduced portions 54 are
symmetrically located centrally in the tabs l3 and 35
the outer portions l5 are symmetrically shaped
and located upon the necks M. The inwardly di
rected edges of the portions 55 ?are outwardly
or diverge and thus provide deep reentrant in
wardly tapering notches in the side edges of the 40
end tabs- The necks M are located entirely outside or beyond the fold lines Of the tabs. The re
entrant angles formed at the juncture of the said
?aps 5 l and 52 with the end tabs l3 Supply COH
Venient angles for engaging and DOSitiVBIY 1009i?- 45
ing the blanks for the Wrapping Operation. F01‘
example, When the Wrapping is done by automatic
machinery gauge pins may be located ‘at these
points»
to wider than the recesses of the blade. The end
tabs are thus shaped for interlocking with the
blade in a longitudinal sense and so prevent endwise shifting which might eventually destroy the
integrity of the wrapping and permit dulling of
55 the blade. The notches or recesses in the blade
As herein shown a safety razorblade 20 of the 50
“AHtOStI‘OD” type is Selected fol‘ illustrative D111‘
poses. These blades have’ oppositely disposed
cutting edges and unsharpened end edges in each .
of which is formed a deep notch or recess 2| hav
ing parallel side edges and bevelled or ?aring out- 55
2
2,131,368
er corners. The blade 20, or a similar blade, may
be presented to the wrapper in automatic machin
ery by a suction head having nozzles which en
gage the blade at spaced points and maintain it
in position by suction. The head is operated to
carry one blade after another from a stack in a
magazine into position in alignment with the suc
cessive wrappers which may be presented by a
rotary turret or other mechanism. In its pre
10
reentrant, inwardly tapering notches in the sides
of the end ?aps.
_.
In the wrapping operation the blade 46 is
presented in alignment with and above the body
portion 30 of the wrapper and in such position
that the end flaps 33 may be folded beneath the
body of the blade while the neck portions 34 are
caused to pass into the end recesses of the blade
liminary position the blade is suspended above
the body of the wrapper H} by substantially the
and interlock therewith. As the folding opera 10
tion continues the enlarged terminal portions 35
height of the main portion of the end tabs £3.
The body of the wrapper and the side flaps I i and
are folded downwardly upon the upper face of
the blade 40 thus establishing a longitudinally in
terlocking relation between the two. Finally the
[2 are held flat or substantially so while the end
tabs l3 are turned into upright and substantially
parallel position, as indicated in Fig. '7. In this
condition the end ?aps may be folded inwardly
and the reduced necks l4 passed into the end
recesses 2i of the blade and this folding operation
continues until the blade 28 is lowered upon the
body ll! of the wrapper. The necks 14 pass fully
into the recesses 2| and the terminal enlarge
blade is completely enclosed by folding the side ~
flap 32 and then the side ?ap 3| as indicated in
Fig. 6.
Having thus disclosed my invention and de
scribed two embodiments thereof for purposes of
illustration but not limitation, I claim as new and 20
desire to secure by Letters Patents:—
1. A safety razor blade having recessed ends
ments l5 of the end tabs lie ?at upon the upper
presenting unsharpened edges, in combination
face of the blade. This completes the interlocking
engagement of the end ?aps with the blade and it
will be seen that the necks I 4 ?t snugly within the
with a protecting cover including end tabs folded
on a line parallel to said unsharpened edges, the 25
recesses 2! so that lateral shifting of the blade
is positively prevented. At the same time the in
ner end of the recess 2i is brought into engage
ment with the enlarged terminal portions i5 of
the flaps so that endwise shifting of the blade in
either direction is positively prevented.
The wrapping of the blade may now be com
pleted by folding the side ?aps I! and I2 inward
ly upon their fold vertex lines. As shown in Fig. 3
the ?ap I 2 is ?rst folded and then the flap H is
brought down upon it in overlapping relation,
completely enclosing the blade, covering the en
larged terminal portions [5 of the end ?aps and
40
edges and diverging inner edges which form deep
preventing displacement thereof.
Accordingly,
tabs having reduced necks engaging the sides
of the recesses and enlarged end portions wider
than said recesses.
2. A safety razor blade having recessed ends,
in combination with at protecting cover including 30
end tabs with reduced neck portions ?tting into
the end recesses and enlarged terminal portions
overlying the blade between the ends of said
recesses, and side ?aps covering said terminal
portions and the otherwise exposed body of the 35
blade.
3. A protected blade having recessed ends, in
combination with a wrapper including a body
portion as long as the blade and end tabs folded
inwardly over the blade ends on fold lines spaced
so long as the side flaps are held in closed position,
the blade is positively anchored in its wrapper
and held against displacement no matter to what
apart by the full length of the blade, the tabs
having reentrant notches forming reduced necks
usage the protected blade may be subjected.
blade and enlarged terminal portions engaged
In Figs. 4 and 5 my invention is illustrated as
applied to the wrapping of a single-edged blade
40 having end notches located unsymmetrically
and closely adjacent to its rear unsharpened edge.
In this case the wrapper comprises a rectangular
body portion 30 and side ?aps 3i and 32 similar to
the corresponding parts of the wrapper shown in
Fig. 1. End flaps 33 are also included in the
wrapper and each is provided in its outer edge
with a reduced portion or neck 34 arranged non
symmetrically and offset toward the fold vertex
line of the side flap 3|. The necks 34 are thus
positioned to register with the end recesses of
the blade 40 when the latter is symmetrically
located upon the wrapper as shown in Fig. 5.
(30 The neck portions 34, as before, terminate in en
50
larged terminal portions 35 having square-cut end
which are received within the end recesses of the
with the inner edges of said recesses.
4. A protected blade having a wrapper with
tabs folded over both ends thereof, the tabs being
symmetrically edge-notched above their respec
tive fold lines and thus provided with centrally
located necks to enter similarly located recesses
in the blade ends and having at their free ends
enlarged portions wider than the recesses in the
blade ends.
5. A protected blade having a wrapper with a
tab folded over one end thereof, the tab having
an unsymmetrically located neck therein located 55
above its fold line, said tab ?tting within an off
set recess in the blade end and having at its free
end an enlarged portion wider than the recess of
the blade.
>
JOSEPH M. BOWEN.
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