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Патент USA US3031883

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May 1, 1962
o. c. BRETT, JR
3,031,873
SKIVING MACHINES
Filed April 18, 1961
3 Sheets—Sheet 1
Inventor
01 we)" 6'. Brett Jr:
By hzs/h‘torney
May 1, 1962
o. c. BRETT, JR
3,031,873
SKIVING MACHINES
Filed April 18, 1961
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W
11
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3 Sheets-Sheet 2
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4
66
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W/k M
May 1, 1962
o; b. BRETT, JR
3,031,873
SKIVING MACHINES
Filed April 18, 1961
3 Sheets-Sheet 3
I '2
Unite ; i grates
3,031,873
Patented May 1,1962
2
1
than a ‘compressed area which results in a narrower
3,031,873
deeper groove.
SKIVING MACIENES
Oliver C. Brett, In, West Boxford, Mass., assignor to
United Shoe Machinery Corporation, Flemington,
NJ., a corporation of New Jersey
Filed Apr. .18, 1961, Ser. No. 103,934
9 Claims. (Cl. 69-16)
‘
,
During the time the riser is in operative position to
form the bulge or compressed area, it is stationary with
respect to the feed roll and presser member. Were the
riser, on the other hand, an annular rib formed on the
feed roll and therefore rotatable with the roll, it would
This invention relates to skiving machines in general
and more particularly to machines which will produce a
scarf containing a groove. One type of skiving machine
which has been in commercial .use for many years is
made in accordance with United States Patents Nos.
be impossible to form a scarf that did not contain a
groove. In order not to limit the machine to the pro
duction of grooved scarfs, the riser is secured to an
arcuate plate which is ‘adjustable within a slot in the
periphery of the feed roll. By rotating the plate, the
riser may be moved away from the presser member and
knife into an inoperative position. Means ‘are also pro
1,652,513 and 1,866,918, granted to Milton H. Ballard,
December 13, 1927, and July 12, 1932, respectively. In 15 vided on the machine to lock the plate and consequently
the Ballard type skiver, a work piece, often shoe upper
leather, is fed to a rotary disk knife by a feed roll and a
the riser in its inoperative position.
>
Since it is more frequently required to form a groove
in a shoulder scarf than in a feather edge scarf, the riser
plate is linked to the carrier which mounts the feed roll
presser member which urges the work piece against the
roll. The edge of the disk knife is located in close prox
imity to the upper edge of the roll whereby a scarf is cut 20 so that the riser is automatically in operative position
on the work piece immediately as it emerges from be
tween the roll. and the presser member. The angle of
to form the bulge or compressed area, and hence, a groove
of maximum depth, when the axis of the feed roll is par
the scarf may be varied by varying the relative angular
allel to the skiving knife, i.e., the position which produces
positions of the knife and roll.
a shoulder scarf. When the machine is treadled to vary
'
' '
To vary the angular relationship in a machine made 25 the angle of the feed roll for the formation of a feather
in accordance with the above-identi?ed Ballard patents,’
edge scarf, the riser is proportionately withdrawn from
ly required. A feather edge scarf is formed along the
inoperative in ‘any portion of angular adjustment of the
vertical alignment with the presser member. When the
the feed roll is mounted in a carrier which is angularly
carriage is ‘moved only a slight amount to produce a
adjustable relative to the knife. The presser member
tapered shoulder scarf, i.e., one that has a slight shoulder
is also mounted on the carrier, so that its relationship
to the roll remains constant. It is, therefore, possible 30 and tapers almost to a feather edge, the riser is withdrawn
a proportionate amount from vertical alignment with the
on the Ballard machine to produce a feather edge scarf,
presser member resulting in a ‘groove of lesser depth.
a flat or shoulder scarf, as well asrcombinations of both,
Full trcadling of the machine results in a full feather
by angular adjustment of the carriage which is accom
edge scarf with complete withdrawal of the riser and
plished by treadle operation.
hence no groove. In order to render theriser completely
On a bal shoe upper both types of scarfs are frequent;
lower margin where it extends beneath and is sewed to
the upper margin of the vamp. A shoulder scarf is
formed along the upper margin where it is {folded over
to make a ?nished top edge for the shoe.
When rela 40
The above and other features of the invention in
folding operation is simpli?ed and the ?nal product is
cluding various novel details of construction and corn
binations ‘of-parts will now be more particularly described
skiving machine capable of producing a groove in either
the invention;
tively stiff heavy leathers are used for shoe uppers, the
kw
feed roll, manual means are provided for locking the
plate and its riser out of ‘operative position whereby no
groove is produced.
with reference to the accompanying drawings and pointed
substantially improved if a groove is formed in the scarf
out in the claims. It will be understood that the par
on the ?esh side of the leather along the line where it
ticular machine embodying the invention is shown by way
is to be folded.
of illustration only and not as a limitation of the inven
Accordingly, one object of this invention is to provide
tion. The principles and features of this invention may
a skiving machine capable of producing a scarf contain
be employed in varied and numerous embodiments with
ing a groove.
out departing from the scope of the invention.
Another object of the invention is to provide a skiving
In the drawings,
machine capable of producing a scarf either with or 50
‘FIG. 1 is a rear elevation of the operating instrumentali
without a ‘groove, depending on operator selection.
ties of a skiving machine of the Ballard type incorporating
Still another object of this invention is to provide a
FIG. 2 is a right side elevation of the portion of the
A further ‘object of this invention is to provide a 55 machine shown in FIG. 1;
FlGS. 3 and 4 are enlarged schematic views of the
skiving machine capable of automatically producing a
feed roll and presser member of the machine'cooperating
groove in a scarf, the depth of the groove being directly‘
to feed a work piece to be skived, FIG. 3 showing a
related to the angle of the ‘scarf.
‘
slotted presser member and FIG. 4 a ?at presser member;
The invention is hereinafter illustrated in a machine
FIGS. 5 and 6 are sectional views, on enlarged scale,
similar to that shown in the above-identi?ed Ballard 60
of work pieces skived by the machine employing the mech
patents to which attention is directed for a complete de
a feather edge or shoulder scarf or combination of both.
anism shown in FIGS. 3 and 4, respectively;
FIGS. 7 and 8 are sectional views of a conventional ?at
ing mechanisms. As a feature of this invention, there
or shoulder scarf, the FIG. 8 scarf having a groove; .
is provided a riser in the form of a dog or similar pro
FIGS. 9 and 10 are sectional views of the scarfs shown
jection extending from a slot in the periphery of the 65
in FIGS. 7 and 8, respectively, after they have been
feed roll toward the presser member. As the work piece
folded;
is fed by the feed roll over the riser, an elongated area
scription of the skiving instrumentalities and their operat
of intensi?ed compression is produced which, when pre
FIGS. 11 and 12 are sectional views of a conventional
feather edge scarf, the FIG. 12 scarf having a groove;
sented to the skiving knife, results in a groove being
formed in the skived surface. The riser in its operative 70 FIGS. 13, l5,‘ l7 and 19 are schematic front elevational
views of the skiving instrumentalities of the machine in
position is in alignment with the presser member which
various relative positions; and,
may be slotted to facilitate formation of a bulge rather
3,031,873
4
3
ness of the unskived portion 4. After the work piece is
shown) and the other end is pivoted on a pin 58 ?tted in
a slotted forward portion of the carrier 48. When the
machine is treadled, the rod 56 advances or retracts the
carrier 43 relative to the machine frame. By this mech
anism the axis of the feed roll 24 and hence its pe
riphery is adjustable relative to the knife plane P has
shown in FIGS. l3, 15, 17 and 19 to produce either a
shoulder scarf, a feather edge scarf or combinations of
both. The amount of angular adjustment is indicated by
skived it is subsequently folded as shown in FIG. 9, with 10
a pointer 6% on a scale 62.
FIGS. 14, 16, 18Vand 20 are schematic side elevational
views showing the corresponding positions of adjustment
of the riser.
__ Referring ?rst to FIGS. 7 through 12, there are shown
sectional views of various scarfs which may be ‘produced
on machines embodying the present invention. FIG. 7
illustrates a work piece W having a ?at or shoulder scarf.
The skived portion 2 is approximately one-half the thick
the free end ‘6 abutting the shoulder‘S.
Note in FIG. 9
.
As a feature of this invention, there is provided a riser
64 in the form of a dog projecting from the periphery of
that the fold 1t) bulges and thereby produces a margin
the feed roll 24 toward the presser member 34. The
which is somewhat thicker than the unskived portion 4
riser is formed on a substantially U-shaped plate 66
of the work piece. This is particularly prevalent when
15 which ?ts slidably within a groove 68 in the feed roll.‘
relatively stiff leather is folded.
The ends of the plate 68 are joined by a linking member
FIG. 8 shows a ?at or shoulder scarf similar to FIG. 7
‘70 which is attached to a rearwardly projecting ?nger '12.
but provided with a longitudinal groove 12 formed 'by a
An operating lever ‘74 is pivoted on a stud 76 threaded
machine embodying the invention. Forming a groove in
into the frame portion 54. The upper edge of the operat
the scarf is advantageous since it takes the inherent
“?ght” or tendency to return to unfolded condition out 20 ing lever 74 is engageable with the lower edge of the
?nger >72 to impart movement to the plate 66 and riser 64.
of the leather. When this scarf is folded along the groove
The ?nger 72 is normally held in engagement with the
12 as shown in FIG. 10, not only is the folding process
operating lever 74 by a spring 78 stretched between the
made easier but the fold 14 does not bulge and is vir
linking member 70 and a block 80 secured to the, carrier
tually the same thickness as the unskived portion 4 of the
work piece which is more desirable than the FIG. 9 fold. 25 guide 50.
Vertical alignment between the riser 64 and the presser
’ FIG. 11 is a sectional view of a work piece W provided
member 34, as seen in FIG. 2, is obtained by rotating an
with a feather edge scarf 16. FIG. 12 shows a scarf
adjusting screw 82 engageable with the lower edge of the.
similar to that of FIG. 11 but provided with a longitudinal
operating lever 74 and threaded in the block 80. A lock
groove 18 also formed by a machine embodying the in
vention. It will be noted that the groove 18 is wider and 30 84 secures the screw 82 in any desired position.
Motion is transmitted to the operating lever 74 from
shallower than the groove 12 of FIG. 8. Although
the carrier 48 by an eccentric stud 86 threaded in the
a feather edge scarfs are not as frequently required to be
carrier bracket 44 and engageable with the lower surface
folded, they may ‘be folded in the same manner as the
of the lever 74. The amount of angular displacement of
shoulder scarfs of FIGS. 7 and 8 with comparable results.
Referring next to FIGS. 1 and 2, there are shown rear 35 the riser 64 from the solid to broken line positions shown
and right side elevational views respectively of the oper
in FIG. 2 when the carrier is moved is controlled by
ating instrumentalities of a skiving machine similar to that
rotating the eccentric stud 86.
The riser operating mechanism may be rendered inop
disclosed in the above-identi?ed Ballard patents to which
erative at the option of the operator by the movement
reference may be had for a more detailed description of
the entire .machine. Briefly, the machine includes a 40 of a bell crank lever 90 from the solid to broken line posi
tions shown in FIG. 1. The lever 90 is pivoted on a
rotary disk skiving knife 20 which is mounted on a shaft
stud 92 threaded in the block 80 with its lower arm held
22. While the knife is shown in the above-identi?ed
by a tension spring 94 in engagement with a stud 96
Ballard patents to be adjustable, for the purposes of this
also threaded in the block. The ends of the spring 94 are
invention it may be considered to be stationary and
rotated about the axis of the shaft 22 with its cutting edge 45 secured to the upper arm 98 and the block 80. When the
operator moves the lever 90 from the solid to broken line
in a plane P. A feed roll 24 is mounted on a shaft 26
positions, the spring passes dead center of the stud 92 and
journaled in a bracket 28 and driven from a pulley 30 by
the end of the upper arm 98 engages the operating lever 74
a belt (not shown). Cooperating with the feed roll 24
elevating it to the broken line position thereby rotating
is a feed disk 32 similar to those shown in the Ballard
patents. The work is fed out of the plane of the drawings 50 the riser plate 66 in a clockwise direction to withdraw
the riser from vertical alignment with the pressure mem
and toward the viewer as seen in FIG. 1 and from right
ber 34. By selective use of the lever 90, the operator is
to left as seen in FIG. 2. A presser member 34 urges
able to prevent a groove from being formed in the scarf
the work piece against the periphery of the feed roll 24.
at whatever angle the feed roll is positioned relative to the
The presser member is mounted on a stud 36 which is
adjustably secured in a bracket 38 which, although not 55 knife plate.
shown in the drawings, is secured to the feed roll bracket
The pressure member 34 is seen'in FIGS. 1 and 3 to
28. The presser member 34 is urged downwardly rela
include a slot 100 in vertical alignment with the riser 64.
tively to the bracket 38 and toward the feed roll 24 by a
‘The presser member may also be unslotted as shown in
coil compression spring 40. An edge gage 42 depends
FIG. 4 depending upon the type of groove it is desired to
from the presser member bracket 38 and is engageable 60 produce. The feed roll 24 and the pressure member 34
normally tend to compress the work piece W slightly as it
with the work piece adjacent the left-hand edge of the feed
is fed to the skiving knife and if it is desired to produce a
roll 24. The edge of the knife 20 is located in close prox
imity to the upper periphery of the feed roll 24 whereby
relatively broad and shallow groove 12' (FIG. 6) an
the scarf is cut on the work piece immediately as it
unslotted .presser member 34 would be employed. As
emerges from between the roll and the presser member 65 the work piece moves between the feed roll and presser
34 traveling from right to left as seen in FIG. 2.
member, the riser '64 produces an elongated area of in:
tensi?ed compression as shown in FIG. 4 which, when
As described in the Ballard patents, the feed roll and
cut by the skiving knife, results in a greater depth of stock
the presser member are adjustable to vary the angle at
being removed from the compressed area than the remain
which the work piece is presented to the plane P of the
knife 20. The feed rol-l bracket 28 is mounted on a car 70 ing portion of the scarf. However, where it is desired to
rier bracket 44 by a conventional slot and screw connec
tion 46. The carrier bracket is secured to an arcuate
dovetail carrier 48 which is slidable in guides 50, 52
produce a narrower and deeper groove 12 as shown in
FIG. 5, a slotted presser member is employed. Here the
riser 64 cooperates with the slot 100 in the presser member
to form an elongated bulge in the ?esh side of the work
secured to a portion 54 of the main machine frame. One
end of a treadle rod 56 is connected to a treadle (not 75 piece.
3,031,873
5
tion of the riser will now be described with reference to
FIGS. 13 to 20. Since it is more frequently advantageous
to form a groove in a'shoulder scarf than in a feather edge
scarf, the riser plate 66 is positioned by the carrier 48 so
that the riser is automatically in operative position to form
the bulge or compression area, and hence, a groove of
maximum depth when the axis. of the feed roll is parallel
to the plane P of the skiving knife, i.e., the position which
is represented by FIGS. 13 and 15. ‘In FIG. 16 the riser 10
64 will be seen to be in vertical alignment with the grooved
6
the skiving knife cuts a grooved scarf, and means opera
tive in response to movement of the movable carrier for
automatically adjusting the riser relative to the presser
member to vary the amount of compression in the work
The relationshipof the angle of the scarf to the posi*
piece whereby the depth of the groove varies automatically
with the angle of the scarf.
5. A skiving machine having, in combination, a‘ feed
roll engageable with a work piece,.a presser member for
urging the work piece against the feed roll, a skiving
knife positioned adjacent the feed roll to cut a scarf on
the work piece as it emerges from between the feed roll
and the presser member, a movable carrier mounting the
presser member 34. However, in FIGS. 13 and 14, the
feed roll for adjustment relative to the skiving knife to
riser is withdrawn from alignment which represents the
vary the angle of the scarf, a'work engaging riser pro
positions the riser will occupy when the manual selecting
lever 90 has disengaged the operating lever 74 from the 15 jecting beyond the periphery of the feed roll toward the,
presser member for‘ creating between them an elongated
carrier, i.e., the position in which no groove will be
area of intensi?ed compression in the work piece whereby
formed. FIGS. 17 and 18 show the feed roll 24 in posi
the skiving knife cuts a grooved scarf, means operative in
response tomovement of the movable carrier for auto
carrier through the eccentric 86 and the lever 74 into an 20 matic adjustment relative to the presser member to vary
the depth of the groove in accordance with the angle of
inoperative position similar to that which it occupies in
the scarf, and selectively operated means for operatively
FIG. 14. FIGS. 19 and 20 show the riser in an intermedi
tion relative to the knife to produce a feather edge scarf.
In this position the riser is automatically rotated by the
ate position where the machine has been partially treadled
to produce a tapered shoulder scarf and wherein the
> disconnecting the riser from the carrier and rendering it
ineffective in compressing the work piece to eliminate the
riser, is only partially withdrawn from vertical alignment 25 groove from the scarf.
with the presser member thereby resulting in less com
pression of the work piece and hence a shallower, wider
groove.
~
6. A skiving machine having, in combination, a feed
roll engageable with a work piece, a presser member for
urging the work piece against the feed roll, a skiving knife
positioned adjacent the feed roll to cut a scarf on the
new and desire to secure by Letters Patent of the United 30 work piece as it emerges between the feed roll and the
Having thus described my invention, what I claim as
States is:
presser member, a work engaging riser projecting beyond
the periphery of the feed roll toward the presser member
roll engageable with a work piece, a presser member for
to form an elongated area. of intensi?ed compression in
1. A skiving machine having, in combination, a feed
the work piece whereby the skiving knife cuts a grooved
positioned adjacent the feed roll to cut a scarf on the 35 scarf, an arcuate plate mounting the riser and movable
within an annular depression in the feed roll, and means
work piece as it emerges from between the feed roll and
for rotating the plate from a position where the riser is
the presser member, and a rigid work engaging riser pro
opposite the presser member to form in the work piece
jecting from a slot in the periphery of the feed roll toward
an area of maximum compression through intermediate
the presser member for'creating between them an elon
positions to an inoperative position Where the riser is
gated area of intensi?ed compression in the work piece
spaced su?iciently ‘from the presser member as not to
whereby the skiving knife cuts a grooved scarf.
compress the work piece.
2. A skiving machine having, in combination, a feed
7. A skiving machine having, in combination, a feed
roll engageable with a work piece, a presser member for
roll engageable with a work piece, a presser member for
urging the work piece against the feed roll, a skiving knife
urging the work piece against the feed roll, a skiving
positioned adjacent the feed roll to cut a scarf on the
knife positioned adjacent the feed roll to cut a scarf on
Work piece as it emerges from between the feed roll and
the work piece as it emerges from between the feed roll
the presser member, a rigid work engaging riser projecting
and the presser member, a movable carrier mounting the
beyond the periphery of the feed roll toward the presser
feed roll for adjustment relative to the skiving knife to
member, and a slot in the presser member in alignment
with the riser, said slot and riser creating between them 50 vary the angle of the scarf, a work engaging riser pro
urging the work piece against the feed roll, a skiving knife
an elongated bulge in the work piece whereby the skiving
jecting beyond the periphery of the feed roll toward the
presser member for creating between them an elongated
area of intensi?ed compression in the work piece whereby
3. A skiving machine having, in combination, a feed
the skiving knife cuts a grooved scarf, an arcuate plate
roll engageable with a work piece, a presser member for
urging the work piece against the feed roll, a skiving knife 55 mounting the riser and movable within an annular de
pression in the feed roll, and means operated by the mov
positioned adjacent the feed roll to cut a scarf on the
able carrier for automatically adjusting the plate to vary
work piece as it emerges from between the feed roll and
the presser member, a rigid Work engaging riser project
the depth of the groove in accordance with the angle of _
ing beyond the periphery of the feed roll toward the
the scarf.
presser member for creating between them an elongated 60
8. A skiving machine having, in combination, a feed
area of intensi?ed compression in the work piece whereby
roll engageable with a Work piece, a presser member for
the skiving knife cuts a grooved scarf, and selectively
urging the work piece against the feed roll, a skiving knife
operated means for rendering said riser inoperative to
positioned adjacent thefeed roll to cut a scarf on the
form a groove in the scarf.
work piece as it emerges from between the feed roll and
4. A skiving machine having, in combination, a feed 65
the
presser member, a movable carrier mounting the feed
roll engageable with a' work piece, a presser member for
roll for adjustment relative to the skiving knife to vary the
urging the work piece against the fee-d roll, a skiving
angle of the scarf, a work engaging riser projecting beyond
knife positioned adjacent the feed roll to cut a scarf on
the
periphery of the feed roll toward the presser member,
the work piece as it emerges from between the feed roll
and the presser member, a movable carrier mounting the 70 a slot in the presser member in alignment with the riser,
said slot and riser creating between them an elongated
feed roll for adjustment relative to the skiving knife to
bulge in the work piece whereby the skiving knife cuts a
vary the angle of the scarf, a work engaging riser pro
knife cuts a grooved scarf.
'
grooved scarf, an arcuate plate mounting the riser and
jecting beyond the periphery vof the feed roll toward the
movable within an annular depression in the feed roll, and
presser member for creating between them an elongated
area of intensi?ed compression in the work piece whereby 75 means operated by the movable carrier for automatically’
7
3,031,873
8
adjusting the plate from a position where the riser is
opposite the slot in the presser member to create a bulge
presser member, a slot- in the presser member in align
ment with the riser, said slot and riser creating between
of maximum magnitude through intermediate positions
them an elongated bulge in the work piece whereby the
skiving knife cuts a grooved scarf, an arcuate plate mount
ing the riser and movable within an annular depression
in the feed roll, means. operated by the movable carrier
for automatically adjusting the plate from a position
where the riser is opposite the slot in the presser member
to an inoperative position where the riser is spaced su?i
ciently from the presser member so as not to create a,
bulge.
9. A skiving machine having, in combination, a feed
roll engageable with a work piece, a presser member for
to create a bulge of maximum'magnitude through inter
urging the work piece against the feed roll, a skiving
knife positioned adjacent the feed roll to cut arscarf on 10 mediate positions to an inoperative position where the
riser is spaced sufficiently from the presser member so
the work piece as it emerges from between the feed roll
as not to create a bulge, and means for locking the riser
and the presser member, a movable carrier mounting the
in said inoperative position.
'
feed roll for adjustment relative to the skiving knife to
vary the angle of the scarf, a work engaging riser pro
No references cited.
jecting beyond the periphery of the feed roll toward the 15
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