Improvements in Leather Rolling Apparatus.
Year: 1895

page_text: Date of Application, 29th Jan., 1895
Complete Specification Left, 11th Mar., 1895-Accepted, 13th Apr., 1895
Improvements in Leather Rolling Apparatus.
1, GEORG FERDINAND BÖGEL, of 30 Bahrenfelderstrasse, Altona-Ottensen,
Germany, Master Coppersmith and Manufacturer, do hereby declare the nature of
this invention to be as follows:-
Leather rolling apparatus with elastic carriages as hitherto constructed are open
to the objection that they do not work with a constant or uniform pressure because
the unevenness of the material being rolled causes at one time a greater and at
another time a less tension of the springs, thereby increasing or reducing the
working pressure. Furthermore with such rolling apparatus there is a continual
swaying or surging of the table according as the carriage is working on the right
hand or on the left hand half of the path of the rolls, so that either the table or
the framing is liable to be bent or broken, or there is produced an injurious
vibration of the building in which the machine is situated.
Moreover, the driving belts are subjected to great wear in consequence of their
running in a fork which is shifted first to the fixed pulley, and then to the loose
pulley, and vice versa; the belt is caused to jump violently; and the reversing
operation makes an unpleasant noise. A further disadvantage is that when the
operator has to roll a skin with the hoofs or with the heads, in which case a
complete passage along the path of the rolls is not necessary, he is obliged with one
hand to guide the leather underneath the roll, and with the other to reverse with a
comparatively great exertion of force in consequence of the inconvenient position of
the reversing lever.
Now the present invention has for its object to obviate these drawbacks and to
provide a rolling apparatus which shall work with any desired but always uniform
pressure, shall be adapted to be set up at any desired spot without damaging the
building wherein it is placed, and in which while using one belt and one belt pulley,
the roll carriage can be moved to and fro, and can be reversed with a small
expenditure of power in any desired position, because the operator has only to turn
the reversing lever, whereupon the reversal is automatically effected by the
carriage.
In the accompanying drawings,
Fig. 1 is a side elevation of a construction of rolling apparatus according to this
invention.
Fig. 2 is a section on the line A-B of Fig. 1, and
Fig. 3 is an end elevation, the belt pulley being omitted.
g
a is a frame in which rotates a screw-spindle upon which is mounted a carriage d
that carries the pressing roll c. Below the carriage there is arranged a table: f
which serves to receive the leather to be pressed and which rests upon two pairs of
toggle-arms which are connected by means of the right and left handed screw h
and connecting rods i and k with a lever fixed on the screw. The lever I carries a
weight m adapted to be shifted by means of a screw and hand wheel or other
suitable device, and which always acts to press the lever down, whereby the toggles
are extended and the table is pressed with a constant or uniform pressure against
the roll c. The to and fro movement of the roll-carriage is effected by means of
a single belt passing over the belt pulley ; the arrangement being such that a

page_text: fluted roll o is mounted on the shaft of the belt pulley, whilst another and
corresponding fluted roll p is fixed on a second shaft s which is carried in the same
bearing. The outer portions of these fluted rolls are always in engagement, whilst
their middle portions are alternately (according to the position of the bearing 9).
brought into engagement with the fluted roll n that is fixed on the screw spindle b,
so as to rotate the fluted roll either in a right hand or in a left hand direction. In
order to allow of the alternate engagement of o or of p with n, the bearing g is made
movable by being connected to a screw-spindle v which is arranged in a bracket u
of the framing, and can be shifted by partially rotating a lever w which is provided
with a corresponding female screw thread and is prevented from moving axially by
means of projections or stops on the bracket.
n
This partial rotation of the lever, and the consequent shifting of the bearing q
are produced automatically by the roll-carriage at the end of the roll-path;
it can also be effected by the roll-carriage in any position of the latter after the
operator has rotated the reversing lever. For this purpose there is arranged
parallel with the screw spindle and so as to be capable of movement in the
framing a, a rod z which is provided with loose collars and is enclosed by an upper
extension y of the carriage. One end of this rod is formed as a round toothed rack
and gears with a toothed are a' on whose axle b' there is fixed a crank which is
connected to the lever w by means of the guide rod d¹. In order to enable the
reversing operation to be effected in any desired position of the roll-carriage,
the rod z is provided with a number of noses or projections fover which the upper
extension of the carriage is normally adapted to slide by means of a suitable
recess g¹ formed in it, but against which noses f¹ it strikes when the rod is
rotated out of its ordinary position. In order to enable this rotation to be effected,
that end of z which is not formed as a toothed rack, is formed with a square
portion over which a lever is placed. This lever is connected with a
treadle by means of suitable rods and bent levers k¹.
Dated this 29th day of January 1895.
Improvements in Leather Rolling Apparatus.
1, GEORG FERDINAND BÖGEL, of 30 Bahrenfelderstrasse Altona-Ottensen,
Germany, Master Coppersmith and Manufacturer, do hereby declare the nature
of this invention and in what manner the same is to be performed to be particularly
described and ascertained in and by the following statement:—
Leather rolling apparatus with elastic carriages as hitherto constructed, are open
to the objection that they do not work with a constant or uniform pressure because
the unevenness of the material being rolled causes at one time a greater and at
another time a less_tension of the springs, thereby increasing or reducing the
working pressure. Furthermore with such rolling apparatus there is a continual
swaying or surging of the table according as the carriage is working on the right
band or on the left hand half of the path of the rolls, so that either the table, or
the framing, is liable to be bent or broken, or there is produced an injurious
vibration of the building in which the machine is situated. Moreover, the driving
belt is subjected to great wear in consequence of its running in a fork which is
shifted first to the fixed pulley, and then to the loose pulley, and vice versa; the
belt is caused to jump violently; and the reversing operation makes an unpleasant
noise. A further disadvantage is that when the operator has to roll the hoofs or

page_text: the head of a skin, in which case a complete passage along the path of the rolls
is not necessary, he is obliged with one hand to guide the leather underneath, the
roll, and with the other to reverse with a comparatively great exertion of force in
consequence of the usually inconvenient position of the reversing lever.
Now the present invention has for its object to obviate these drawbacks and to
provide a rolling apparatus which shall work with any desired but always uniform
pressure, shall be adapted to be set up at any desired spot without damaging the
building wherein it is placed, and in which while using one belt and one belt pulley,
the roll-carriage can be moved to and fro, and can be reversed with a small
expenditure of power in any desired position, because the operator has only to
turn the reversing lever, whereupon the reversal is automatically effected by the
carriage.
In the drawings filed with my Provisional Specification,
Fig. 1 is a side elevation showing a construction of rolling apparatus according
to this invention;
Fig. 2 is a section on the line A-B of Fig. 1, and
Fig. 3 is an end elevation, the belt pulley being omitted.
b
uniform
a is a frame in which rotates a screw spindle upon which is mounted a carriage d
that carries the pressing roll c. Below the carriage is arranged a table f which
serves to receive the leather to be pressed and which rests upon two pairs of
toggle arms g which are connected by means of a right and left handed screw hand
connecting rods i and k with a lever fixed on the screw. The lever carries a
weight in adapted to be shifted by means of a screw and hand wheel or other
suitable device, and which always acts to press the lever down, whereby the
toggles are extended and the table is pressed with a constant or
pressure against the roll c. The to-and-fro movement of the roll-carriage is
effected by means of a single belt passing over the belt pulley t. For this
purpose a fluted roll o is mounted on the shaft r of the belt pulley, whilst
another and corresponding fluted roll p is fixed on a second shafts which is
carried in the same bearing. The outer end portions of these fluted rolls are
always in engagement, whilst their middle portions are alternately (according
to the position of the bearing q) brought into engagement with a fluted roll n
fixed on the screw spindle b, so as to rotate the said fluted roll n either in a
right hand or in a left hand direction. In order to allow of the alternate engage-
ment of oor of p with n, the bearing 9 is made movable by being connected
to a screw-spindle which is arranged in a bracket u of the framing and can
be shifted by partially rotating a lever to which is provided with a corresponding
female screw thread and is prevented from moving axially by means
projections or stops on the bracket. This partial rotation of the lever, and the
consequent shifting of the bearing 9 are produced automatically by the roll-
carriage at the end of the roll-path; it can also be effected by the roll-carriage
in any position of the latter after the operator has rotated the reversing lever.
For this purpose there is arranged parallel with the screw spindle 6 and so as.
to be capable of movement in the framing a, a rod z which is provided with
adjustable rings or collars and is enclosed by an upper extension y of the
carriage. One end of this rod is formed as a round toothed rack and gears
with a toothed arc a¹ on whose axle b₁ there is fixed a crank c' which is
connected to the lever w by means of the rod d'. In order to enable the
reversing operation to be effected in any desired position of the roll-carriage,
the rod is provided with a number of noses or projections over which
the upper extension of the carriage is normally adapted to slide by means of a
suitable recess g' formed in it, but against which noses or projections the
extension of the carriage strikes when the rod is rotated out of its ordinary
position. In order to enable this rotation to be effected, that end of z which is
not formed as a toothed rack, is formed with a square portion h' over which a
lever is placed. This lever i¹ is connected with a treadle by means of suitable
rods and bent levers k¹.
of

page_text: •
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. A leather rolling apparatus in which for the purpose of producing a constant
or uniform pressure on the leather to be rolled, the work table is supported on
toggle arms which are extended by means of the action of a weight, that is capable
of being adjusted or varied at will, so as to press the table against the pressing roll,
substantially as described.
2. In the leather rolling apparatus specified in the preceding claim, the use for
the purpose of producing the to and fro movement of the carriage by means of one
belt and one belt-pulley, of a reversing mechanism comprising two fluted rollers
arranged in a movable bearing, the outer portions of these rollers being always in
engagement with each other, whilst the one or the other of the middle portions of
the said rollers are capable of being caused to automatically gear with a third fluted
roller fixed on the driving spindle of the carriage substantially as described.
3. In the reversing mechanism specified in Claim 2, the particular arrangement of
apparatus for effecting the shifting of the bearing either automatically at the end
of the travel of the carriage, or in any desired position of the carriage at the will
of the operator, the said apparatus comprising a rod that is provided with adjustable
rings or collars and with noses or projections arranged to pass through an extension
of the carriage, and is adapted to be partly rotated by means of a treadle lever and
suitable connections, the arrangement being such that when the said extension
strikes against one of the rings or collars, or, when the rod is rotated, against one of
the noses or projections, it will be shifted endways and caused to act through a
toothed arc and suitable connecting levers upon a screw spindle, so as to move the
latter, together with the bearing, in the required manner, substantially as herein
described.
4. My improved leather rolling apparatus constructed, arranged and operating
substantially as described and shown.
Dated this 11th day of March 1895.