Improvements in the Manufacture and Application of Claw Clamps or Fittings for Uniting, Strengthening, and Ornamenting Corners, Edges, and other parts of Boxes and other Objects of Cardboard, Wood, Leather, and the like, and in Machinery therefor.
Year: 1887

page_text: Date of Application, 28th May, 1887.
Specification Accepted, 8th July, 1887
Improvements in the Manufacture and Application of Claw Clamps
or Fittings for Uniting, Strengthening, and Ornamenting Corners,
Edges, and other parts of Boxes and other Objects of Cardboard,
Wood, Leather, and the like, and in Machinery therefor.
We, JEAN SCHERBEL, Merchant and TEODOR REMUS, Engineer both of Dresden
Saxony 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 :-
This invention refers to the manufacture and application of certain metal claw
clamps bindings or fittings for uniting strengthening and ornamenting corners edges
and other parts of boxes and other objects of cardboard, wood, leather and the like,
the construction and application of such fittings being described in the specifications
of patents No. 8590 of 1885 No. 12997 of 1886 and No. 273 of 1887. By means of
this invention we are enabled in one operation and by one machine to perform the
following operations viz. to cut off and apply such metal claw clamps or fittings; or
secondly to form a flat metal strip already provided with serrated edges into claw
clamp shape, to cut it into pieces of the required length and to apply the same; or
thirdly to cut a blank flat metal strip into pieces of the required length, to provide
same with one or more acute angled teeth, to form same into claw clamp shape and to
apply the same.
In the accompanying drawings we have illustrated machines for carrying into effect
each of the first named methods.
In all three main forms the machine consists of a double armed lever B turning on
a fulcrum pin A, a spring or weight being applied to one arm of the lever B (for
instance by the intervention of a connecting rod a) for the purpose of holding the
arm normally down upon the saddle or rest ; while a connecting rod c is applied to
the front arm and connected to a treadle or crank for depressing that arm as required
the action of the aforesaid spring or weight raising it again. This front arm carries the
working parts, and an anvil C is provided under its end and made of the form
for the surfaces of cardboard or other material to be united by the clamps or to which
the same are otherwise to be applied. In the drawings we have shown the anvil C of
ги

page_text: a right angled saddle form suitable for applying angle clamps. For applying the
fittings to flat surfaces the anvil would be flat."
In Figure 1 of the drawings is shown the machine as constructed for carrying out
the first mode of manufacture. The front end of lever is in this case provided with
a hammer D of a die form for the purpose of uniting the corners of cardboard and
other boxes by means of claw clamps. The sliding sleeve or head E which surrounds
the hammer D serves to guide the claw clamp shaped strips or bands to the place
where the claw clamps are to be applied and has for this purpose a slot on its back
side of the form of the cross section of the claw clamps by means of which the claw
clamps are introduced. But besides this the sliding head E also serves as the cutting
or shearing part. When at rest the sliding head E by means of the spring d projects
so far beyond the end of the hammer D, that the latter is above the guide slot and
therefore allows the claw clamp strips to enter through the slot in the head E.
A gutter e with the regulating tooth e, is situated behind the guide slot. The claw
clamp strip to be used is so laid in this gutter e, that its front end lies in the
space in
the sliding head E and the regulating tooth e, takes into a tooth space in the strip.
If the front arm of the lever B be now depressed, the sliding head E first touches
the anvil C which prevents its further motion whilst the hammer D continues its
stroke. The hammer D penetrates further into the sliding head or sleeve E, and
by its back edge in connection with the opposite edge of the slot in the sleeve E
cuts off that piece of binding strip which is inside of the head E and presses
same on the surfaces underneath thereby producing the connection as shewn in
Figure 2. On the front arm of the lever being raised the sliding head E is again
forced down by means of the spring d. As soon as the slot in the sliding head E is
again free the claw clamp strip is pressed so far forwards (for instance by means of a
suitable spring mechanism) until it touches the opposite side of the inside of the head
or sleeve E. By each repeated movement of the lever B the here described action
takes place.
For the production on a large scale of boxes or such like articles for which claw
clamps serve as a means of fastening the capabilities of the machine may be still
further extended by arranging it to partly or wholly make the claw clamps.
According to the kind of work to be done the claw clamps are made of strips on
which the acute angled teeth are already formed or these teeth may be formed at the
time of cutting the band like strips into the desired lengths.
In Figures 3 to 12 of the accompanying drawings the machine is shewn in its most
complete form as arranged for the production of claw clamps from strips provided
with teeth. In Figures 3 to 10 the pressing appliances are in the form of rolls for
changing the flat band or strip into the necessary sectional form for the production of
claw clamps for corner or flat fastenings in Figures 11 and 12 on the contrary the
pressing appliances are in the form of stamping dies. In other respects the machines
are similar.
The hammer D is securely screwed to the front arm of the lever B (as shewn in
Figures 1 and 2) or they may be made in one as shewn at Figures 3, 4, 5, 6, 7, 8
and 10.
The back of the hammer D forms a slide rest for the sliding head Ẹ which can slide
up and down thereon.
In the sliding head E is contained the pressing apparatus, which serves to change
the sectional form of the serrated strips brought to it and transforms them into claw
clamps. In Figures 3 to 10 are shewn the rolls f, and gy, the former of which
serve to prepare the claw clamp strips forming them into the section shewn in
Figure 13 and the latter viz.: the rolls gg, serve for finishing the claw clamp strips
into the form shewn in Figure 14 when the claw clamps are to serve for fastening
together corners of boxes and the like. If the claw clamps are to be made in the
machine of a form suitable for fastening together flat surfaces, correspondingly formed
pressing or stamping appliances are arranged inside the sliding head E.
The shaping roils ff, and g g₁ receive their pressing rotating action by the following
mechanism.

page_text: On each spindle of the rolls ff, and g g₁ is mounted a tooth wheel h. A larger
wheel i mounted on the spindle k gears simultaneously into the two wheels / mounted
on the upper rolls see Figures 9 and 10. On the other end of the spindle k is fixed
the ratchet wheel 1 as shewn in Figures 3, 4 and 5. Mounted loosely on the spindle &
in front of the ratchet wheel is the ratchet lever m with the pawl n.
The stud is mounted on one side of the lever B and projects into a curved or
angled slot in the lever p. The levers p and m are adjustably connected by the
connecting rod 7. According to the position given to the connecting rod 9 on the
levers p and m the stroke of the lever m may be modified and thereby the travel of
the pairs of rolls made larger or smaller. The position of the connecting rod
Figure 3 is that which allows the greatest travel for the rolls and therefore suitable
for the application of the longest claw clamps used.
in
Inside of the sliding head E facing the hammer D and in a line with the rolls ƒ f₁
and 9 g, there is a slot corresponding in shape to the cross section of the claw-clamp.
The lower edge of this slot and the back lower edge of the hammer D serve in this
case as shears by means of which the piece is cut off from the strip when to be
applied as a claw clamp.
When the lever B is at rest the sliding head E is held in its lowest position on the
hammer D by the spring r. In this position the slot in the front side of the sliding
head E is left open for the passage of the claw clamp strip which has just passed
through the rolls.
The front arm of the lever is then depressed by means of the connecting rode and
the stud o pushes the lever p forward, as shown in the drawing from right to left.
The connecting rod transfers this motion to the lever m and from thence by means
of the pawl n and pawl wheel on to the spindle and tooth wheel i. The tooth
wheel then revolves the rolls ff, and 99₁. These rolls thereby feed the strip
between them at the same time giving to the strip its proper form as required and
deliver it into the saddle notch formed in the lower end of the hammer D.
In consequence of the shape of the curved slot in the lever p the driving motion of
the stud o stops at that moment when the sliding head E touches the bed plate Fas
shown in Figures 4 and 7 the strip then in the head E remaining motionless. The
lever B then moves on further and the hammer D passes down past the sliding head E
and the before mentioned cutting parts cut the finished claw clamp off when in the
saddle piece in the lower part of the hammer D from the strip which is still in the
sliding head E. At the end of the travel of the lever the hammer comes down
against the anvil C as shown in Figures 5 and 8 and strikes on the claw clamp already
on the card board box parts and secures the two together.
The anvil C is adjustable lengthways in the bed plate F and may be fixed more or
less projecting according to the size or depth of the cardboard box.
When releasing the pressure of the foot on the treadle the spring on the back arm
of the lever B acts thereon and moves same with all its connected parts back into the
position of rest as shown in Figures 3 and 6. By each following lowering of the
lever B the above described action takes place, a piece of the serrated metal strip
being drawn through the rolls ff and g, g₁ and formed into a claw clamp, the front
part of the claw clamp strip lying in the saddle piece of the hammer being cut off by
the cutting parts and this part which is cut off is applied to and serves for holding
together the pieces of cardboard which are placed under it.
The work of stamping and advancing forwards of the metal strips might be done
equally well on the upward motion of the front arm of the lever, if the stud o the
levers p and m and the ratchet or pawl wheel and pawl n were correspondingly
arranged and the tooth wheel i geared into wheels mounted on the rolls, and g₁.
The method of manufacture illustrated by figure 11 which is a side view and
figure 12 a sectional part side view distinguishes itself from the method just described
only in so far that instead of pressing rollers pressing dies are employed.
The upper die fis fixed while the lower die g is vertically movable.
Figure 15 is a longitudinal, section through the pressing dies figure 16 a plan of
the lower die 9, and figures 17, 18 and 19 are three cross sections through the dies at

page_text: various points to illustrate their form, which is as follows. The working faces are
straight at the entering side for the serrated strips, as shown in figure 17. Towards
the middle they gradually assume the form shown in figure 18 to correspond with the
initial or preparatory form of clamp shown in section figure 13. From the middle
outwards the dies gradually assume the form shewn in figure 19 whereby the strip
is formed into the section shewn in figure 14. The upper edge at the entering
end of the die f serves also as a shear.
For the purpose of feeding the strip into the machine the sliding head E is
provided with a pair of feed rolls st which are driven by tooth wheel gear like
the aforesaid pressing rolls.
As the front arm of the lever B descends the feed rolls st bring a piece of
the serrated strip between the dies f and g which as it gradually advances
between them towards the hammer D is made to assume the required claw clamp
section figure 14 it then enters the saddle notch of the hammer D. and is
applied to the surfaces previously placed below it in the already described manner.
We will now describe the third and last method of manufacture which is illustrated
by Figures 20 and 23 these are horizontal sections showing the modifications
given to the tools in the sliding head E when it is required to make claw
clamps from plain band strips all in one operation. In figure 20 the arrangement
of the tools is such as is needed when the strip is to be fed into the machine
at right angles to its length direction. The feed rolls st feed at right angles
to the length direction of the machine and are driven by a pair of bevil wheels
from the spindle A. The shears for cutting off the pieces of the strip are
placed latterally at the back end of the pressing dies fg and are of such section as to
make a cut in the shape of acute angled teeth on each side of the strip. Hence by each
action of the lever B a piece of the form figure 21 or figure 22 or the like is cut off
the strip. The latter may of course be of greater or less width and the pieces cut off
may have a less or greater number of teeth. The slide which is worked from the
lever B pushes each piece cut off in between the dies fg whereby the pieces already
between them are pushed forward. By this gradual progression between the dies fg
the pieces gradually assume the form of finished claw clamps ready to be knocked
onto and into the surfaces to which they are to be applied. In order to prevent the
pieces from assuming wrong positions during their progress between the dies fg the
stroke of the latter is made as short as possible.
In the horizontal section figure 23 through the sliding head E the arrangement is
such as is needed when the plain band strips are fed into the tool at an angle of 45°
to the length direction of the machine. The shears are also here formed of the back
edges of the dies fg which cut off pieces of the form shown in figure 24. The pieces
already cut off are by the forward motion or feed of the band or strip gradually
pushed along between the dies and they assume the required claw clamp shape, coming
at last under the hammer D and are knocked onto and into the material.
In the three last described and illustrated arrangements we have only contemplated
die shaped pressing tools, but we may instead employ pressing rolls, the pieces being
severally fed thereto and special shears being provided.
Although we have above only specially referred to claw clamps for uniting the corners
of boxes and the like, it will nevertheless with a knowledge of previous patents herein-
before referred to be obvious that claw clamps suitable for other purposes may be
applied and made by these machines when the tools or parts thereof are suitably
modified. Thus for instance for making claw clamps for flat surfaces the pressing
appliances in the head E would have to be such as to produce claw clamps of the section
Figure 13 or the like; and the opposite working faces of hammer D and anvil C would
be flat instead of saddle shaped.
Having now particularly described and ascertained the nature of our said invention
and in what manner the same is to be performed we declare that what we claim is :
First. The method of manufacture and application of claw clamps consisting in
cutting pieces off a metal band or strip of claw clamp section and applying them, all

page_text: in one operation; and by one machine into which the strip may be automatically fed
substantially as set forth.
Second. The method of manufacture and application of claw clamps consisting in
shaping a flat band or strip formed with acute angled serrated sides into claw clamp
section, cutting it into pieces of the required length and applying them, all in one
operation and by one machine into which the strip is automatically fed substantially as
set forth.
Third. The method of manufacture and application of claw clamps consisting in
cutting pieces off a plain strip or band while giving the pieces one or more acute
angled lateral teeth, forming the pieces into claw clamps and applying them, all in one
operation and by one machine into which the strip is automatically fed substantially as
set forth.
Fourth. The machines described with reference to the accompanying drawings
consisting mainly of a double armed lever B operated by connecting rod c from a
treadle or crank and by a spring or weight at the opposite end, the lever being
provided with a hammer having a sliding head containing the tools and operating
against an anvil C for the cardboard or other material for automatically performing
the operations of shearing and with or without appliances for feeding and for forming
the plain or serrated strip into claw clamp section substantially as described.
Fifth. The machine described with reference to Figures 1 and 2 consisting mainly
of the double armed lever B capable of being reciprocated and provided with a hammer D
with sliding spring head E acting as shears and having gutter e and regulating tooth e
the said hammer operating against an anvil C for the cardboard or other material
substantially as set forth.
Sixth. The machine described with reference to Figures 3 to 10 consisting mainly
of the double armed lever B capable of being reciprocated and provided with a
hammer with sliding spring head E having feeding and shaping rolls ff, and g g₁
tooth wheel and ratchet gear for driving same and shear slit the said hammer
operating against an anvil C for the cardboard or other material substantially as set
forth.
al
Seventh. The machine described with reference to Figures 11 to 19 consisting
mainly of the double armed lever B capable of being reciprocated and provided with
hammer with sliding spring head E having feeding rolls s, t, tooth wheel and
ratcher gear for driving same, and pressing and shearing dies f. y, the said hammer
operating against an anvil for the cardboard or other material substantially as
set forth.
Eighth. The machines described with reference to Figures 20 to 23 consisting
mainly of a double armed lever B as set forth in the previous claims the hammer
bevil tooth wheel and ratchet
having a sliding spring head E with feeding rolls s,
gear for driving same and pressing and shearing dies fg the said hammer operating
against an anvil C for the cardboard or other material substantially as set forth.
Ninth. The various constructions of sliding head E for the purposes set forth.
Tenth. The constructions of pressing dies f, g for the purpose set forth.
Dated this 28th day of May 1887.
JEAN SCHERBEL.
TEODOR REMUS.
By Jensen & Son,
77, Chancery Lane, London, W.C.,
Patent Agents.

page_text: This Print is in accordance with the Original Specification as it stands after
Amendment (under Section 18 of the Patents, &c., Act, 1883), as allowed by
the decision of the Chief Examiner of the 19th day of February 1897.
Date of Application, 28th May, 1887-Accepted, 8th July, 1887
COMPLETE SPECIFICATION (AMENDED).
Improvements in the Manufacture and Application of Claw Clamps
or Fittings for Uniting, Strengthening, and Ornamenting Corners,
Edges, and other parts of Boxes and other Objects of Cardboard,
Wood, Leather, and the like, and in Machinery therefor.
We, JEAN SCHERBEL, Merchant and TEODOR REMUS, Engineer both of Dresden
Saxony 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 :—
This invention refers to the manufacture and application of certain metal claw
clamps bindings or fittings for uniting strengthening and ornamenting corners edges
and other parts of boxes and other objects of cardboard, wood, leather and the like,
the construction and application of such fittings being described in the specifications
By means of
of patents No. 8590 of 1885 No. 12997 of 1886 and No. 273 of 1887.
this invention we are enabled in one operation and by one machine to perform the
following operations viz. to cut off and apply such metal claw clamps or fittings; or
secondly to forn a flat metal strip already provided with serrated edges into claw
clamp shape, to cut it into pieces of the required length and to apply the same; or
thirdly to cut a blank flat metal strip into pieces of the required length, to provide
same with one or more acute angled teeth, to form same into claw clamp shape and to
apply the same.
In the accompanying drawings we have illustrated machines for carrying into effect
each of the first named methods.
In all three main forms the machine consists of a double armed lever B turning on
a fulcrum pin A, a spring or weight being applied to one arm of the lever B (for
instance by the intervention of a connecting rod a) for the purpose of holding the
arm normally down upon the saddle or rest 6; while a connecting rod c is applied to
the front arm and connected to a treadle or crank for depressing that arm as required
the action of the aforesaid spring or weight raising it again. This front arm carries the
working parts, and an anvil C is provided under its end and made of the form
for the surfaces of cardboard or other material to be united by the clamps or to which
the same are otherwise to be applied. In the drawings we have shown the anvil C of
a right angled saddle form suitable for applying angle clamps. For applying the
fittings to flat surfaces the anvil would be flat.
In Figure 1 of the drawings is shown the machine as constructed for carrying out
the first mode of manufacture. The front end of lever B is in this case provided with
hammer D of a die form for the purpose of uniting the corners of cardboard and

page_text: other boxes by means of claw clamps. The sliding sleeve or head E which surrounds
the hammer D serves to guide the claw clamp shaped strips or bands to the place
where the claw clamps are to be applied and has for this purpose a slot on its back
side of the form of the cross section of the claw clamps by means of which the claw
clamps are introduced. But besides this the sliding head E also serves as the cutting
or shearing part. When at rest the sliding head E by means of the spring d projects
so far beyond the end of the haminer D, that the latter is above the guide slot and
therefore allows the claw clamp strips to enter through the slot in the head E.
A gutter e with the regulating tooth e₁, is situated behind the guide slot. The claw
clamp strip to be used is so laid in this gutter e, that its front end lies in the space in
the sliding head E and the regulating tooth e, takes into a tooth space in the strip.
If the front arm of the lever B be now depressed, the sliding head E first touches
the anvil C which prevents its further motion whilst the hammer D continues its
stroke. The hammer D penetrates further into the sliding head or sleeve E, and
by its back edge in connection with the opposite edge of the slot in the sleeve E
cuts off that piece of binding strip which is inside of the head E and presses
same on the surfaces underneath thereby producing the connection as shewn in
Figure 2.
On the front arm of the lever being raised the sliding head E is again
forced down by means of the spring d. As soon as the slot in the sliding head E is
again free the claw clamp strip is pressed so far forwards (for instance by means of a
suitable spring mechanism) until it touches the opposite side of the inside of the head
or sleeve E. By each repeated movement of the lever B the here described action
takes place.
For the production on a large scale of boxes or such like articles for which claw
clamps serve as a means of fastening the capabilities of the machine may be still
further extended by arranging it to partly or wholly make the claw clamps.
According to the kind of work to be done the claw clamps are made of strips on
which the acute angled teeth are already formed or these teeth may be formed at the
time of cutting the band like strips into the desired lengths.
In Figures 3 to 12 of the accompanying drawings the machine is shewn in its most
complete form as arranged for the production of claw clamps from strips provided
with teeth. In Figures 3 to 10 the pressing appliances are in the form of rolls for
changing the flat band or strip into the necessary sectional form for the production of
claw clamps for corner or flat fastenings in Figures 11 and 12 on the contrary the
pressing appliances are in the form of stamping dies. In other respects the machines
are similar.
The hammer D is securely screwed to the front arm of the lever B (as shewn in
Figures 1 and 2) or they may be made in one as shewn at Figures 3, 4, 5, 6, 7, 8
and 10.
The back of the hammer D forms a slide rest for the sliding head E which can slide
up and down thereon.
In the sliding head E is contained the pressing apparatus, which serves to change
the sectional form of the serrated strips brought to it and transforms them into claw
clamps. In Figures 3 to 10 are shewn the rolls ff, and 9 g, the former of which
serve to prepare the claw clamp strips forming them into the section shewn in
Figure 13 and the latter viz.: the rolls g₁ serve for finishing the claw clamp strips
into the form shewn in Figure 14 when the claw clamps are to serve for fastening
together corners of boxes and the like. If the claw clamps are to be made in the
machine of a form suitable for fastening together flat surfaces, correspondingly formed
pressing or stamping appliances are arranged inside the sliding head E.
The shaping rolls ff₁ and g g₁ receive their pressing rotating action by the following
mechanism.
On each spindle of the rolls ff, and g g₁ is mounted a tooth wheel h. A larger
wheel mounted on the spindle k gears.simultaneously into the two wheels & mounted
on the upper rolls see Figures 9 and 10. On the other end of the spindle k is fixed
the ratchet wheel as shewn in Figures 3, 4 and 5. Mounted loosely on the spindle k
in front of the ratchet wheel is the ratchet lever m with the pawl n.

page_text: The stud o is nounted on one side of the lever B and projects into a curved or
angled slot in the lever p. The levers p and m are adjustably connected by the
connecting rod q. According to the position given to the connecting rod q on the
levers P and m the stroke of the lever m may be modified and thereby the travel of
the pairs of rolls inade larger or smaller. The position of the connecting rod
Figure 3 is that which allows the greatest travel for the rolls and therefore suitable
for the application of the longest claw clamps used.
in
Inside of the sliding head E facing the hammer D and in a line with the rolls ff₁
and 9 91 there is a slot corresponding in shape to the cross section of the claw-clamp.
The lower edge of this slot and the back lower edge of the hammer D serve in this
case as shears by means of which the piece is cut off from the strip when to be
applied as a claw clamp.
When the lever B is at rest the sliding head E is held in its lowest position on the
hammer D by the spring ?. In this position the slot in the front side of the sliding
head E is left open for the passage of the claw clamp strip which has just passed
through the rolls.
The front arm of the lever is then depressed by means of the connecting rod c and
the stud o pushes the lever p forward, as shown in the drawing from right to left.
The connecting rod transfers this motion to the lever m and from thence by means
of the pawl n and pawl wheel on to the spindle k and tooth wheel i. The tooth
wheel then revolves the rolls ƒ ƒ and g gr These rolls thereby feed the strip
between them at the same time giving to the strip its proper form as required and
deliver it into the saddle notch formed in the lower end of the hammer D.
In consequence of the shape of the curved slot in the lever p the driving notion of
the stud o stops at that moment when the sliding head E touches the bed plate F as
shown in Figures 4 and 7 the strip then in the head E remaining motionless. The
lever B then moves on further and the hammer passes down past the sliding head E
and the before mentioned cutting parts cut the finished claw clamp off when in the
saddle piece in the lower part of the hammer D from the strip which is still in the
sliding head E. At the end of the travel of the lever the hammer comes down
against the anvil C as shown in Figures 5 and 8 and strikes on the claw clamp already
on the card board box parts and secures the two together.
The anvil C is adjustable lengthways in the bed plate F and may be fixed more or
less projecting according to the size or depth of the cardboard box.
When releasing the pressure of the foot on the treadle the spring on the back arın
of the lever B acts thereon and moves same with all its connected parts back into the
position of rest as shown in Figures 3 and 6. By each following lowering of the
fever B the above described action takes place, a piece of the serrated metal strip
being drawn through the rolls ff, and y, g₁ and formed into a claw clamp, the front
part of the claw clamp strip lying in the saddle piece of the hammer being cut off by
the cutting parts and this part which is cut off is applied to and serves for holding
together the pieces of cardboard which are placed under it.
The work of stamping and advancing forwards of the metal strips might be done
equally well on the upward motion of the front arm of the lever, if the stud o the
levers p and m and the ratchet or pawl wheel and pawl n were correspondingly
arranged and the tooth wheel i geared into wheels mounted on the rolls f₁ and g₁.
The method of manufacture illustrated by figure 11 which is a side view and
figure 12 a sectional part side view distinguishes itself from the method just described
only in so far that instead of pressing rollers pressing dies are employed.
The upper die fis fixed while the lower die g is vertically movable.
Figure 15 is a longitudinal section through the pressing dies figure 16 a plan of
the lower die g, and figures 17, 18 and 19 are three cross sections through the dies at
various points to illustrate their form, which is as follows. The working faces are
straight at the entering side for the serrated strips, as shown in figure 17. Towards
the middle they gradually assume the form shown in figure 18 to correspond with the
initial or preparatory form of clamp shown in section figure 13.
outwards the dies gradually assume the form shewn in figure 19 whereby the strip
From the middle

page_text: is formed into the section shewn in figure 14. The upper edge at the entering
end of the die ƒ serves also as a shear.
For the purpose of feeding the strip into the machine the sliding head E is
provided with a pair of feed rolls at which are driven by tooth wheel gear like
the aforesaid pressing rolls.
As the front arm of the lever B descends the feed rolls 8 bring a piece of
the serrated strip between the dies f and g which as it gradually advances
between them towards the hammer D is made to assume the required claw clamp
section figure 14: it then enters the saddle notch of the hammer D and is
applied to the surfaces previously placed below it in the already described manner.
We will now describe the third and last method of manufacture which is illustrated
by Figures 20 and 23 these are horizontal sections showing the modifications
given to the tools in the sliding head E when it is required to make claw
clamps from plain band strips all in one operation. In figure 20 the arrangement
of the tools is such as is needed when the strip is to be fed into the machine
at right angles to its length direction. The feed rolls st feed at right angles
to the length direction of the machine and are driven by a pair of bevil wheels
from the spindle k. The shears for cutting off the pieces of the strip are
placed latterally at the back end of the pressing dies f g and are of such section as to
make a cut in the shape of acute angled teeth on each side of the strip. Hence by each
action of the lever B a piece of the form figure 21 or figure 22 or the like is cut off
the strip. The latter may of course be of greater or less width and the pieces cut off
may have a less or greater number of teeth. The slide u which is worked from the
lever B pushes each piece cut off in between the dies f g whereby the pieces already
between them are pushed forward. By this gradual progression between the dies f g
the pieces gradually assume the form of finished claw clamps ready to be knocked
onto and into the surfaces to which they are to be applied. In order to prevent the
pieces from assuming wrong positions during their progress between the dies f g the
stroke of the latter is made as short as possible.
In the horizontal section figure 23 through the sliding head E the arrangement is
such as is needed when the plain band strips are fed in to the tool at an angle of 45°
to the length direction of the machine. The shears are also here formed of the back
edges of the dies f g which cut off pieces of the form shown in figure 24. The pieces
already cut off are by the forward motion or feed of the band or strip gradually
pushed along between the dies and they assume the required claw clamp, shape
coming at last under the hammer D and are knocked onto and into the material.
In the three last described and illustrated arrangements we have only contemplated
die shaped pressing tools, but we may instead employ pressing rolls, the pieces being
severally fed thereto and special shears being provided.
Although we have above only specially referred to claw clamps for uniting the corners
of boxes and the like, it will nevertheless with a knowledge of previous patents herein-
before referred to be obvious that claw clamps suitable for other purposes may be
applied and made by these machines when the tools or parts thereof are suitably
modified. Thus for instance for making claw clamps for flat surfaces the pressing
appliances in the head E would have to be such as to produce claw clamps of the section
Figure 13 or the like; and the opposite working faces of hammer D and anvil C would
be flat instead of saddle shaped.
Having now particularly described and ascertained the nature of our said invention
and in what manner the same is to be performed we declare that what we claim is:
1. The machines described with reference to the accompanying drawings consisting
mainly of a double arined lever B operated by connecting rod c from a treadle or
crank and by a spring or weight at the opposite end, the lever being provided with
a hammer having a sliding head containing the tools and operating against an
anvil C for the cardboard or other material for automatically performing the
operations of shearing and with or without appliances for feeding and for forming the
plain or serrated strip into claw clamp section substantially as described.

page_text: 2. The machine described with reference to Figures 1 and 2 consisting mainly of
the double armed lever B capable of being reciprocated and provided with a hammer D
with sliding spring head E acting as shears and having gutter e and regulating tooth e₁
the said hammer operating against an anvil C for the cardboard or other material
substantially as set forth.
"
3. The machine described with reference to Figures 3 to 10 consisting mainly
of the double armed lever B capable of being reciprocated and provided with a
hammer D with sliding spring head E having feeding and shaping rolls ff, and 9 g₁
tooth wheel and ratchet gear for driving same and shear slit the said hammer
operating against an anvil Ċ for the cardboard or other material substantially as set
forth.
4. The machine described with reference to Figures 11 to 19 consisting mainly
of the double armed lever B capable of being reciprocated and provided with
a hammer D with sliding spring head E having feeding rolls s, t, tooth wheel and
ratchet gear for driving same, and pressing and shearing dies f, g, the said hammer
operating against an anvil C for the cardboard or other material substantially as
set forth.
5. The machines described with reference to Figures 20 to 26 consisting mainly
of a double armed lever B as set forth in the previous claims the hammer D
having a sliding spring head E with feeding rolls 8, t bevil tooth wheel and ratchet
gear for driving same and pressing and shearing dies f, g the said hammer operating
against an anvil C for the cardboard or other material substantially as set forth.
.
Dated this 26th day of May 1001.
JEAN SCHERBEL.
TEODOR REMUS.
By Jensen & Son,
77, Chancery Lane, London, W.C.,
Patent Agents.