Clamps for Uniting the Corners of Boxes and other Objects Made of Cardboard and other Materials and in Apparatus therefor.
Year: 1886

page_text: Արկած anu Аррисано of Ang
Clamps for Uniting the Corners of Boxes and other Objects
Made of Cardboard and other Materials and in Apparatus
therefor.
I, JEAN SCHERBEL of Dresden Saxony but at present of De Keysers Hotel
Blackfriars in the City of London Merchant do hereby declare the nature of this
invention, (a communication to me from abroad by Teodor Remus of Dresden
Saxony Engineer,) and in what manner the same is to be perforined to be
particularly described and ascertained in and by the following statement:―
In the specification of the Patent granted to Peter Jensen dated 15th July 1885
No. 8590 is described a system of uniting the corners of cardboard and other boxes
by means of metallic angle clamps provided with claws which are made to enter the
material of the box, and means are described for affixing these clamps to the box.
Now according to this present invention such clamps are made and applied
according to new or improved processes and by the use of new or improved
apparatus all as hereinafter described with reference to the accompanying
drawings.
Figure 1 is a plan view and Figure 2 end view of a form of corner clamp
described in the aforesaid patent specification. According to this present invention
two such clamps are manufactured at the same time from one strip of sheet metal
by means of apparatus shown in plan at Figure 3 and in cross section at Figure 4.
A and B are two cutters having their serrated cutting edges towards each other
and fixed onto a bedplate C at a distance equal to the width of the angle clamp in
its first form. D and E are stops for insuring the proper distance of the cutting
edge. The cutter or stamp acting together with the two cutters A and B fill the
space between the two.
The piece of sheet "tin" or other metal to be operated on is first placed with its
end against the stop D and with its edge only so far over the cutter B that the
cutting edge of the latter only comes into action. When the stamp has descended
and cut the left hand edge of the sheet the latter is pushed forward that the cut
Price 1171

page_text: edge comes against the stop E as shown in dotted lines in Figure 3. The stamp
thereupon descending will cut the sheet into two like pieces which are serrated
along each edge and of the form shown in Figure 5. One of these so formed
pieces drops down between the two cutters A and B while the other piece slides off
along the slanting face of the cutter A and under the stop E.
The blanks so far made into the form Figure 5 are next pressed by means of the
stamp and die shown in section in Figure 6 or rolled by means of the rolls shown
in the side view Figure 7 and end view Figure 8 into the form shown in Figure 9.
The clamps so far made are then pressed by means of the stamp and die shown
in section in Figure 10 or rolled by means of the rolls shown in the side view
Figure 11 and end view Figure 12 so that they thereby assume the sectional shape
shown in Figure 13. This form of claw clamp is for application to the outside of
the corners of boxes.
For claw clamps which are to be used for the inside corners of boxes the clamps
made into the shape shown in Figure 9 are further pressed by means of the stamp
and die shown in the cross sectional view Figure 14 or rolled by the rolls shown in
the side view Figure 15 and end view Figure 16 so that they thereby assume the
sectional shape shown in Figure 17.
The apparatus herein before described and shown may be arranged as single
machines or be severally combined into machines forming systems. As an example
I have in the sectional end view Figure 18 shown how two sets of rolls may be
combined into one machine, where the rolls F G and H serve to guide the clamps
as they come from the other or shaping rolls and straighten them if bent.
-
In the aforesaid processes of working the form and size of the lateral projections
on the pieces are immaterial.
The clamps having been made in suitable lengths are next cut off to the required
lengths.
The next part of this invention consists in improved means for affixing the
clamps such for instance as the clamp shown in Figures 1 and 2 to the corners of
cardboard and other boxes.
A is an
Figure 19 is a sectional end view and Figure 20 a side view of an improved
construction of apparatus for affixing the clamps to the corners of boxes.
anvil for supporting the sides of the box which have to be united at the corner at
right angles. B is a hammer arranged above the anvil and having a right angled
saddle shaped groove in its lower side corresponding to the right angled apex of the
anvil. CC are plates connected to the lower sides of the hammer B and D is a
spring which tends to force the plates C down so far as to project a little beyond
the saddle shaped groove.
In the space so formed in the saddle shaped groove the clamp a is inserted, the
claws b, resting upon the plates C in the exactly required position and so that
the claws b are prevented from being bent outward.
The hammer containing the clamp a as shewn is next by any suitable mechanism
knocked down against the surfaces which have to be united and which rest on the
anvil A. The points of the claws b and also the lower edges of the plates C will
thus be brought in contact with the surfaces to be united and this latter will
continue thus, the plates C being pressed up against the spring D until the claws b
have been driven completely into the sides of the box thereby uniting the ends of
the sides into a strong corner as shown in Figure 21.
When it is desired that the claws of the clamps shall not only enter the material
of the box but also be clinched or bent over on the inner side another form of
apparatus is used which is shown in cross section in Figure 22 and in side view in
Figure 23. E, E are plates applied to each of the sides of the anvil and pressed
up against the interior of the sides of the box by means of helical springs F so as
to be above the level of the sides of the anvil which is recessed to the depth of
the plates E such recesses serving to receive the plates when they are depressed
as shown by the dotted lines in Figure 22 that is to say so as to be flush with the
sides of the anvil.

page_text: The claws b are as will be seen of extra length so as to allow of clinching.
When the hammer is let down against the clamp the plates E will because of their
supporting springs F offer resistance against depression until the claws are driven
entirely in and through so as to project on the inside of the box as shewn in
Figure 22. During the entry of these claws b they glide past the somewhat
slanting upper edges of the plates E and are thereby slightly bent; hence as the
hammer goes further down the points of the claws b will be knocked down against
the solid body of the anvil A and will be bent round against it or clinched. During
this clinching or bending of the points of the claws the plates E must take their
lowest position in the recesses for them in the anvil because during this time the
full pressure of the hammer B acts on the surfaces to be united and hence also
on the plates E. Figure 24 shows the clamps thus applied in the clinched condition.
A similar machine is used for applying the claws shown in Figure 17 to the
inside corners of a box the only difference in the manipulation being that the claw
is placed on the anvil.
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 as the invention communicated to me is:-
:-
First The improved manufacture of claw clamps for uniting the corners of
boxes consisting in the cutting out of two blanks at the same time from one piece
of sheet metal and then pressing or rolling the same first into the section Figure 9
and then into the section Figure 13 or Figure 17 substantially as described.
Second-The combination of parts forming the apparatus for cutting out clamp
blanks substantially as described with reference to Figures 3 and 4.
Third The improved means for forming the clamp blanks into claw clamps
substantially as described with reference to Figures 6 to 16.
Fourth-The improved construction of apparatus for affixing the claw clamps
substantially as described with reference to Figures 19 to 24.