Year: 1885

page_text: I, HERBERT JOHN ALLISON, of 52 Chancery Lane, London, in the County of
Middlesex, Patent Agent, do hereby declare the nature of this invention, which has,
been communicated to me from abroad by Patrick P. Sherry, Henry Robinson,
and Henry F. Hurlburt, Gentlemen, all of Lynn, Massachusetts, United States of
America, and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
This invention relates to rotary cutters formed to trim and mould boot and shoe
heels and it bas for its object first to enable the same tool at one operation to trim
and finish the heel seat and the top lift at all parts of the moulded portion of the
heel.
The invention also has for its object to provide improved means for supporting the
work and presenting it to the cutter. To these ends the invention consists first in
a cutter composed of two sections mounted on a power rotated arbor and capable of
separating so that the entire width of the cutter may vary to correspond to the
variation between the width of the moulded portion of the heel at the sides and at
the back, the latter being the wider portion in heels of womens boots and shoes in
consequence of the increased backward inclination of the rear portion of the heel.
The sections of my improved cutter are provided respectively with a guard for the
heel seat and for the face of the top lift, and said guards are kept in contact with
the heel seat and top lift of the heel by a spring which normally presses one section
toward the other and permits the sections to be separated by the increase in the
width of the heel when the side portion passes from, and the rear portion is
presented to the cutter.
The invention consists secondly in the combination with such tool of a positively
rotated roll arranged to support the heel while it is being presented to the tool,
its positive rotation being in such direction that it feeds or presses the heel against
the tool and thus materially aids the operator. The invention also consists in a
non-rotating bearing plate or support for the top lift combined with a rotary trimming
Pindi

page_text: cutter which is made in two sections, one of which is movable toward and
from the other, and with a suitable guide which prevents the plate from rotating
all of which I will now proceed to describe.
Of the accompanying drawings forming a part of this specification, Figure 1
represents a side elevation showing my improved cutter in operation on the side or
narrower portion of a heel. Figure 2 represents a side elevation showing the
cutter in operation on the back or wider portion of the heel. Figure 3 represents
a section on line. x x Figure 1. Figures 4 and 5, represent modifications of my
improved trimmer. Figure 6 represents a front elevation of a machine having the
improved cutter and feed roll. Figure 7 represents an end view.
The same letters of reference indicate the same parts in all the figures.
In the drawings a and a¹ represent the sections composing my improved cutter.
The section a is rigidly attached to an arbor b, which is mounted in suitable
bearings and rotated by power while the section a¹ is rigidly attached to a sleeve
or collar c, which is adapted to move endwise independently on said arbor, and is
caused to rotate therewith by a stud o affixed to the collar and a longitudinal
groove b' in the arbor receiving the stud, the latter having an anti friction roller
which permits it to move easily in the slot.
e represents a spring which is placed on the arbor and presses the sleeve c and..
cutter section a¹ toward the cutter section a, so that normally the two sections are
in contact with each other as shown in Figure 1. The section a is provided with a
lip or guard 2, which projects over the heel seat, and prevents the upper from
touching the cutting edges. The ends of the cutting edges next to the guard 2 are
formed to mold or shape the heel seat. The section a¹ is provided with a bevelled
guard or rest 3, for the face of the top lift. The angle formed by the guard or
rest 3, and the molded surface of the section a' conforms to the angle formed by the
edge and face of the top lift of the heel as shown.
The sections a and a' are preferably composed of toothed plates secured together,
the plates of the section a being clamped between a shoulder +, and a nut 5, on the
arbor b, while the plates of the section a¹ are secured by screws 6, to the sleeve c,
the teeth t, on the proximate plates on the two sectious are offset or project out-
wardly, the teeth t, on the one section projecting into spaces between the teeth t,
on the other section, so that when the sections are separated or moved apart there
will be no break in the cutting surface.
The cutter is preferably of such width when its sections are in contact with each
other that when the side of the heel is presented to the cutter the guard 2, will
bear on the heel seat and the rest 3, against the face of the top lift as shown in
Figure 1. As the heel is turned to present its wider rear portion to the cutter the
Bection a gradually separates from the section a, as shown in Figure 2, the guard
and rest still maintaining the same relation to the heel seat and top lift. When
the opposite side of the heel is brought to bear on the cutter the spring e forces thie
section a toward the section a. It will be seen therefore that the cutter acts
uniformly on all parts of the heel, finishing at one operation the top lift and heel
seat, on the wider as well as on the narrower portions of the heel. The
heel is therefore completely trinned at one operation instead of requiring a
separate operation to complete the trimming of the heel seat and the angle of the
top lift, thus effecting a saving in time and in expense of machinery.
In Figure 4, the arrangement of the sections a, a', is such that their proximate
sides are diagonal, so that when they are separated each will project over a part of
the surface on which the other acts. In Figure 5, the respective sections (a, a¹)
instead of being each provided with a number of smaller interlocking teeth are
each provided with a single off-set which extends into the recess of the other
section.
The arbor b, on which the cutter is mounted is journalled in a frame c³, and
rotated by a belt or other suitable means in the direction indicated by the arrow in
Figure 7. & represents an arbor journalled in bearings on the frame c³, and pro-

page_text: vided with a pulley e, to receive a driving belt. To said arbor is affixed a roll f,
which is arranged somewhat below and in advance of the cutter, so that it is capable
of supporting a heel presented to the cutter. The arbor d and its roll are rotated
in a direction opposite to that in which the cutter is rotated as indicated in Figure 7,
so that the roll not only supports the heel but feeds or presses it against the
cutter r. The workman is therefore required to exert much less effort in pre-
senting the heel than he would be if the positively rotated roll were not employed.
When used with a trimming cutter the roll f. preferably has a corrugated
periphery to enable it to take a better. hold on the work. Should the roll be
used with a rotary burnisher it would be best to provide it with a yielding
rubber cover to give it friction on the heel without indenting it.
As the top lift is formed by a die before its application to the heel, and therefore
needs no trimming, a plain surface or rest having no cutting teeth is provided for
it in trimming cutters, said surface being generally flush with the molded cutting
surface. This rest may be constructed in the form of a plate i, having an orifice
receiving a boss on the section a'. The plate i is not attached to said section and
is provided with an arm or off-set i¹, which bas an orifice through which the
arbor d passes. The periphery of the main portion of the plate i, is flush with the
molded surface of the cutter and constitutes a non-rotating rest for the edge of
the top lift, the plate being prevented from rotating by the arbor d. The
advantage of a non-rotating rest for the edge of the top lift is that the top lift is
not burned by the friction attending the use of a rest affixed to the tool. When
the section a slides on the arbor b the plate i moving freely on the arbor d slides
with said section.
I am aware that a loose roll has been used as a support for the heel in a trim-
ming machine, but am not aware that a positively rotated one has ever been
used. The advantages of a rotated over a loose roll are obvious and need not be
repeated.
Is
I am also aware that a non-rotating rest for the top lift edge has been used in a
trimming machine, and do not therefore claim the same excepting as constructed
and combined by me.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is
་
First. The combination in a rotary heel trimmer of two sections overlapping each
other and presenting a convex trimming surface, curved to adapt it for the contour
of a side of a heel, one of said sections having a yielding movement whereby the
convex trimming surface is automatically lengthened to act on the extende i rear
portion of the heel, substantially as set forth.
Second. A rotary heel trimmer composed of two sections overlapping each other,
one formed to trim the heel seat, and the upper portion of the heel, and having a
guard 2, while the other is formed to trim the lower portion of the heel, and has a
top lift rest 3, one of said sections having yielding movement whereby the trimmer
is enabled to adjust itself to the varying width of the heel, as set forth.
Third. The combination of an arbor, a trimmer section affixed thereto and
provided with a guard formed to enter the groove between the counter and rand
or heel seat of a boot or shoe with knives formed to trim the heel seat and the
adjacent portion of the surface of the heel, a trimmer section rotating with but
adapted to slide on the arbor toward and from the other section and formed to
trim the lower portion of the heel, a rest for the face of the top lift attached to
the sliding section and a spring whereby said sliding section is enabled to conform
to the variations in the width of the heel, said sections being formed to overlap
each other, as set forth.
Fourth. The combination with a positively rotated tool formed to act on a
boot or shoe heel, of a heel supporting and feeding roll and means substantially as

page_text: described for positively rotating said feeding roll in a direction opposite to the
direction of the rotation of the tool, as set forth.
Fifth. The combination with the trimming cutter composed of the non-adjustable
section a and the yielding or adjustable section a¹ of the plate i, supported by the
yielding section, and a guide d, engaged with said plate whereby the plate is pre-
vented from rotating and is permitted to slide with the yielding section, as set
forth.