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Патент USA US2406610

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Aug. 27, 1946.
'
A, KELSALL
’
~2,406,610
ENVELOPE OPENING‘ DEVICE
Filed April 25, 1945
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FIG. I
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Inventor
FEEDER/6K A. KELSALL
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--Aug. 27; 1946.
‘2,406,610
F. A. KELSALL
ENVELOPE OPENI‘NG DEVICE
Filed April 23', 1945
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2,406,610
Patented Aug. 27, 1946
‘UNITED STATES ‘FATENT OFFICE
2,406,610
ENVELOPE OPENING DEVICE
Frederick A. Kelsall, Boulder, Colo.
Application April 23, 1945, Serial No. 589,869
3 Claims.
(Cl. 3€l_—131)
1
2
" being secured to the front wall 2, as by screws I6,
with a spacing means between the blade and said
wall. Preferably, the spacing means has the form
My invention relates to improvements in en
velope opening devices, the primary object in view
being to provide a device of simple, inexpensive
of a spacing bar I? of the same type as said blade
construction for shearing one edge of an envelope
quickly and evenly ‘so that the contents may be
quickly removed, and which functions to shear
the edge off uniformly in predetermined degree,
store the cuttings in hidden condition for subse-v
Ill and which is secured in place by said screws
I5. The shearing blade I4 may be provided with
widened ends, as at I8, bearing against the bottom
wall 4 to align the edge I5 with the bottom of the
slot l I.
quent disposal thereof, is self-sharpening, easy
to operate, will not get out of order, and is 710 A vertically rocking, shearing blade, I9, similar
' to the blade I4, but having a right angled down
adapted for prolonged use.
‘
turned end 2%, is pivoted to one end and rear side
'T0 the accomplishment of the above, and sub
of said. blade I4 by a screw 2| passing through
ordinate objects presently appearing, a preferred
embodiment of my invention has been illustrated
in the accompanying drawings, set forth in detail
in the succeeding‘ description, and defined inthe
claims appended hereto.
15.
In said drawings:
Figure l is a view in top plan of. my improved
envelope opening‘ device, inlits- preferred embodie’ 20.'
ment,
.
V
Figure 3 is a view inlongitudinal section taken
on the line 3-3 of Figure 1,
Figure 4 is‘ a view in perspective with parts
shown in section,
Figure 5 is a view in end elevation partly in sec
tion.
Figure 6 is a view in transverse section showing .
end wall 5 is provided with a circular outlet open
ing 8 therein closed by a threaded disc-type clo
sure 9 having a knurled edge Ill providing for a '
?rm grip thereon.
A longitudinal, central slot
II is provided in the front wall 2 and end walls '
lapping relation to said shearing blade‘ Ill and
provided with an upper edge extension '25 pro
jecting out of the casing I through a top slot 26
in the wall 5, said extension being provided with
a right angled edge ?ange Z‘I overlying the top
wall 5 and forming a pressure member for rocking
30’
the shearing blade I 9 and the stop plate 23 down
wardly. A coil spring 28 interposed between the
top wall 5 and said flange 21 and countersunk at
its ends in said top wall‘ and ?ange yieldingly
- holds the flange 2‘! elevated and consequently the
and which is provided with front, rear, bottom, ;
top and end walls designated 2, 3, II, 5 and 6, re
spectively. Preferably, the corners of the casing
I are beveled, as at ‘I, to obviate sharp edges. One
to coact with the shearing edge I5 of the blade I4
when the blade I9 is rocked downwardly against‘
the edge of the envelope I2 inserted between said
blades. A relatively wider stop plate 23 extends
along the back of the shearing blade I9 in over
which is secured to the shearing blade I9, as by
screws 2:3. At the end of_ the shearing blade I9
opposite the pivot’screw 2|, the stop plate 23 is
Figure 2 is a view in front elevation,
modification of the invention.
Referring to the drawings by numerals, my im
proved envelope opening device, as shown, com,
prises an elongated, rectangular casing -I of sub
stantially the length of the usual letter envelope
said end 29 into the blade Ill, and whereby a low
er shearing edge 22 on, said blade I9 is arranged
shearing blade I9 and stop plate 23 in elevated
normal position in which an edge of the envelope
I2 may be inserted between said shearing blades
I4 and I9. '
The casing I and closure 9 may be formed of
40 any light strong material, preferably a plastic.
The shearing blades I4 and I9, together with the
spacing bar I‘! and the stop plate 23, are prefera
bly formed of metal. .
The manner in which the described invention
6, said slot II opening into the casing I between
the end walls 6 and being of the requisite width 45 is used and operated will be readily understood.
With the casing l grasped. for instance. in the left
to accommodate therein one edge of the usual let
hand. the selected edge of the envelope I2 is in
ter envelope. as shown in dotted lines at l2. Bev
serted in. the slot I I against the stop plate 23 and
eled guide ribs I3 are provided along the top and
the shearing blade I9 is then rocked downwardly
bottom. of said slot I I to facilitate entering the
50 by pressure exerted. for instance, by the thumb,
edge of the envelope l2 in said slot.
~ A stationary, bar-like shearing blade III, of rec
tangular cross section, extends along the bottom
of the slot I I. inside the casing l . from end to end
of the casing and with an upper ?at shearing edge
I 5 level with the bottom of the slot I I, said blade
on the flange 21. The shearing blade I9 is thus
caused to cooperate with the shearing blade I4 to
shear o? said edge of the envelope ‘I2, the cut
tings falling between the shearing blade l4 and
“ the stop plate 23 into the bottom of the casing.
2,406,610
3
The coil spring 28 opposes depression of the flange
2‘! and the described operation of the shearing
blade I9 and stop plate 23 and, as shown in Fig
ure 4, limits downward movement of these parts
so that excessive operation of the shearing blade
4
blade, and a spring interposed between said top
and said ?ange and thereby yieldingly retaining
said pivoted blade in raised position.
2. In an envelope cutting device, an elongated
substantially rectangular casing adapted to form
[9 is prevented. As will be clear, the spring 23
a closed storage receptacle for envelope cuttings
returns the operated parts to the described nor
and embodying a front side and a top, said side
mal condition. The stop plate ‘23, it will be seen,
having a longitudinal slot therein for insertion
provides a gauge for predetermining the width
of one edge of an envelope therethrough into
of the cutting which is sheared off the edge of the 10 said chamber, a shearing blade in said chamber
envelope I2. As shown in Figure 6, a spacing bar
?xed to said side and having an upper shearing
29 similar to the shearing blade [9 may be inter
edge extending along the bottom of said slot, a
posed between said blade I9 and the stop plate 23,
second shearing blade in said chamber pivoted
and the stop plate 23 may be set back further
at one end to one end of the ?xed blade for rock
from the slot ! l to provide for a wider cutting be 15' ing movement from normal position into coopera
ing sheared from the envelope l2. It may be
tive relation to the ?xed blade to cut said edge
stated at this point that the slot 26 is wider than
of the envelope with a shearing action, an edge
the extension 23 so as to provide for such setting
extension on the other end of said pivoted blade
back of the stop plate 23. Since the slot H ex
extending through said top and provided with a
tends from end to end ‘of the casing I, as pre 20 lateral ?ange forming a presser member for rock
viously described, envelopes longer than the cas
ing said pivoted blade, a spring interposed be
ing i may be slid into said slot from the appro
tween said top and said ?ange and thereby
priate end of the casing l and the edge of the
yieldingly retaining said pivoted blade in raised
envelopes sheared off progressively. Accumu
position, and a stop bar ?xed on said pivoted
lated cuttings may be disposed of by unscrewing 25 blade to establish the position of said edge of
the closure 9 and removing said cuttings through
the envelope relative to said blades.
the opening 8.
.
3. In an envelope opening device, an elongated
The foregoing will, it is believed, su?ice to
substantially rectangular casing adapted to form
impart a clear understanding of my invention ~ a closed storage receptacle for envelope cuttings
without further explanation.
'30 and embodying a front side and a top, said side
Manifestly, the invention, as described, is sus
having a longitudinal slot therein for insertion
ceptible of modi?cation without departing from
of one edge ofan envelope therethrough into
the inventive concept, and right is herein re
said chamber, a shearing blade in said chamber
served to such modi?cations as fall within the
?xed to said side and having an upper shear
scope of the appended claims.
35 ing
edge extending along the bottom of said slot,
What I claim is:
a second shearing blade in said chamber pivoted
1. In an envelope opening device, an elongated
at one end to one end of the ?xed blade for
substantially rectangular casing adapted to form
rocking movement from normal position into co
a closed storage receptacle for envelope cuttings
operative relation to the ?xed blade to out said
and embodying a front side and a top, said side 40 edge of the envelope with a shearing action, an
having a longitudinal slot therein for insertion of
edge extension on the other end of said pivoted
one edge of an envelope therethrough into said
blade extending through said top and provided
chamber, a shearing blade in said chamber ?xed
with a lateral ?ange forming a presser member
to said side and having an upper shearing edge
for rocking said pivoted blade, a spring inter
45
extending along the bottom of said slot. a second
posed between said top and said ?ange and there
shearing blade in said chamber pivoted at one
by yieldingly retaining said pivoted blade in
end of the ?xed blade for rocking movement from
raised position, a stop bar ?xed on said pivoted
normal position into cooperative relation to the
blade to establish the position of said edge of
?xed blade to out said edge of the envelope with - the envelope relative to said blades, and spacing
50
a shearing action, an edge extension on the
means between said ?xed blade and said side of
other end of said pivoted blade extending through
the casing for setting said blades back from said
said top and provided with a lateral flange form
slot.
.
ing a presser member for rocking said pivoted
FREDERICK A. KELSALL.
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