Wire-staples.
Year: 1886

page_text: Date of Application, 15th June, 1886.
Specification Accepted, 22nd Feb., 1887.
Wire-staples.
I CARL LOUIS LASCH, of Rendnitz-Leipzig, in the Kingdom of Saxony, Mechanical
Engineer, 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 :—
My invention relates primarily to the wire staple machines described in the
specification of Letters Patent No. 16,137; dated the Sth day of December 1884, and
more especially to the mechanism for bending the partly formed staple over flie edge
of a cardboard box or similar object.
As described in the said specification, the bending plates p¹ pl. Fig. 10, are held
apart by a spring B, and no special means are employed for holding down the centre
of the staple while its sides are being bent by the said plates.
In order to obtain rounded corners and ensure a regular formation of the staples, I
hold the staples in the centre where the angle is to be formed, by a bolt or pin
situated between the two bending plates p' p' and adapted to receive an intermittent
up and down motion depending on the motion or position of the bending plates.
The utility of this holding down bar or bolt, which takes the place of the said
spring B and the manner in which its motion depends on the position of the bending
plates, will appear from the accompanying diagrams Figs. 1 to 4, which illustrate
four consecutive stages of operation, while Fig. 6 is an elevation and Fig. 6ª a section
of a staple forming head, Figs. 7 and 8 represent two different positions of the
clenching apparatus, and the remaining figures illustrate details.
During the up motion of the bending and cutting slide C, (see Fig. 6), provided
with the two tongues cc, the feed rollers (set in motion by a ratchet mechanism) push
into the staple forming head of the machine, the exact length of wire which is
necessary for the formation of a staple. Fig. 1 represents this stage of operations.
Now the bending block H, by turning on its pivot, is placed into the position
shown in figures 5 and 6, whereby the two projections or arms hh, of the bending
block will arrive under the wire introduced into the staple forming head, see Fig. 1.
The driving plates a, a, together with the holding down bolt b, (the lower end of which

page_text: is level with the lower ends of the driving plates a a), will now move downward and
press the wire upon the projecting arms h, h, of the bending block H. This block H,
the plates a, a, and the holding down bolt bremain in this position, Fig. 1, and hold
the wire, while the cutting and bending knives c, c, move downward, cut off the wire
in front of the round guide e (when passing the knife edge V formed between the
oblique lower groove of the guide e and the face of the same, see Fig. 12), and then
bend the ends of the wire over the projecting arms h, h, so as to form a staple of the
shape shown by Fig. 2, (S²).
After the cutting and bending knives c, c, have reached their lowest position, they
remain stationary, the bending block now recedes, the driving plates a, a together
with the holding, down bolt & move downward and drive the staple between the
converging sides of the deflecting plates d, d into the sheet of cardboard.
This process is illustrated by Figs. 3 and 4; Fig. 3 representing the moment when
the driving of the staple into the cardboard just begins, while Fig. 4 represents the
end of this operation.
The clinching process illustrated by Figs. 7 and 8, is substantially the same as
described in the specification of patent No. 16137 of 1884, mentioned above. The
clenching appliance chiefly comprises a casing screwed to the supporting saddle and
containing a slide i. This slide carries the clenching plates k, k, which in their lowest
position are spread apart by the oblique projections m formed on the cover of the
clenching apparatus. During the up motion of the slide the spread bending
plates k, k, press the projecting ends of the staple upward, even if the same have
assumed an oblique position, (that is to say inclined against the wall of the casing).
After the shanks of the staple have been completely bent upward, the plates k, k
assume automatically the position represented by Fig. 8, in which they rest on a pin n
secured to the slide and press the shanks of the staple firmly against the cardboard.
The shape of the holding down holt and the mechanism for producing or controlling
its motion may be as illustrated by Figs. 9, to 11", of the accompanying drawings.
The driving plates a, a, are pivoted at the top to a vertical slide A (Figs. 9 and 9º),
set in motion by an arm J; (which corresponds to the arm shown in Fig. 8 of the
specification of patent No. 16,137 mentioned above); the said arm J passing through
a perforation a³, Fig. 9. The holding down bolt forms part of another slide B,
(Figs. 10 and 10"), mounted on the face of the slide A, so that the projecting rear
part of the bolt will be situated between the drivers a, a.
The upper slide B has a vertical slot 2, through which passes the arm J, so as to
move the slide B during a portion only of the travel of the arm J, while during the
remaining portion the slide remains stationary, but the slide A, (which has a circular
perforation a² for the arm J) continues to move. The slide B is guided by a vertical
rod D fixed to a boss of the slide B, and passing through a flange a formed at the
top of the slide A. Between the boss or projection and the flange a' is interposed a
spring E which tends to press the slide B down upon the staple, while the slide A
completes its downward travel.
The lower slide A is guided in a vertical groove of the plate C, (see Figs. 6 and 11"),
which plate corresponds to the plate shown in Fig. 8 of the specification No. 16,137,
mentioned above. The plates A and C, and the block H may be set in motion in the
same manner as the corresponding parts shown in Fig. 8 of my previous patent
specification, (lever h and connecting rods and o).
In the machine described by the specification No. 16137 of 1884, all motions are
produced by a treadle which sets in motion the eccentrics or grooved discs K¹ K" by
means of a special mechanism.
In some cases, however, it is desirable to drive the eccentrics by steam or other
engine power, and in order to render this practicable I have devised a special
mechanism for converting uniform rotary motion into rotary motion in the same
direction, but made intermittent at the will of the operator. Such a mechanism is
illustrated by sheet 2 of the accompanying drawings; Fig. being a vertical section
of the driving pulley and a side view of the adjoining parts of the machine; and

page_text: Fig. 2 a partial end elevation of the machine frame and driving gear. The remaining
figures represent details.
A is a driving pulley mounted loose on the driving shaft B, and set in motion by a
belt in the direction of the arrow. In the interior of the pulley is secured a pawl C,
and a spring D placed so as to press the extremity c of the pawl C towards the axis of
the shaft B. On the shaft B, and in the same plane as the pawl C, is fixed a specially
constructed disc E shown in detail by Figs. 3 and 4. This disc E has on its inner
face a circular groove e concentric with the shaft B, and at its circumference a
segmental recess e, so as to form an edge or tooth similar to a ratchet tooth.
circularly curved spring F screwed at one end to the circumference of the disc E,
covers this recess so as to form part of the cylindrical circumference of the disc E.
To the free end of the spring Fis secured a pin G passing through a radial perforation
of the disc E, and projecting with its obliquely cut inner end into the groove e.
A
Under the influence of its own elasticity, the spring would enter the recess e¹ and
press the pin G into the groove e so as to uncover the edge e². If, now, the pawl C,
sliding on the circumference of the disc D, meets the edge e, it will drive the disc E
and shaft B in the direction of the arrow, but as soon as the pin G is forced outwards,
so that the spring covers the recess e and forms part of the circular circumference of
the disc the pawl C will simply slide over the circumference of E, and the motion
of the disc will therefore cease.
In order to force the pin G with spring F outward, when required, I employ a
forked angle lever H, provided on its inner face with a nose projecting into the
groove e, so as to come in contact with the oblique face of the pin G during the
revolution of the disc E. The lever H is pivoted right and left of the driving axle to
a pair of brackets I, I, secured to the machine frame J. A connecting rod K and
treadle, operated by the attendant, serve to press the nose h into the groove e, when
it is desired to stop the motion of the driving shaft. A plate of leather or other
suitable material attached to the lever H comes in contact with the face of the disc E
and acts as a brake when the lever H is pressed against the disc E, and stops the latter
almost immediately.
This driving and stopping mechanism, although specially designed for my wire
staple machines, is equally applicable to other wire staple machines, and I do not
therefore limit myself to this special application. As compared with ratchet
mechanism hitherto used for a similar purpose, it has the peculiar feature that the
motion is not controlled by acting on the pawl, but by changing the shape or function
of the wheel or disc on which the pawl slides.
Fig. 2 shows also a mechanism for operating the clenching apparatus from the
eccentrically grooved dises mounted on shaft B.
For this purpose the circumference of the said disc is provided with a nose a adapted
to push the adjustable connecting rod e away from the axis of the disc. The motion
of this connecting rod, (adjustable by a slot and screw), is communicated to the
clenching apparatus through lever b³, connecting rod 62 and levers 3, 4, in the manner
illustrated by Fig. 2..
Having now particularly described and ascertained the nature of my said Inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:
1. In mechanism for bending staples over the angles or edges of cardboard boxes or
similar objects, a bolt or har adapted to hold or retain the staple in position while the
sides are being bent at an angle, substantially as described.
2. In machines for connecting sheets of cardboard or similar material at an angle to
each other by means of wire staples, a bar or bolt adapted to hold the staple, while the
shanks of the latter penetrate the sheet at the sides, and the back of the staple is being
bent over the edge or angle, substantially as described.
3. The combination with cutting knives c, c, e, driving plates a, a, supporting
arms h, h; of a holding down bolt adapted to operate in the manner substantially as
described, and illustrated by sheet I of the drawings.

page_text: 4. The combination with cutting knives c, c, e, driving plates a, a, supporting
arms, hand bending plates d, d, of a holding down bolt b, adapted to operate in the
manner substantially as described, and illustrated by sheet I of the drawings.
5. The combination of lower slide A and driving plates a, a, with upper slide B and
holding down bolt b, spring E interposed between the two slides, and means for setting
in motion and guiding the slides, substantially as described and illustrated by sheet
one of the drawings.
6. In wire staple machines mechanism for converting uniform into intermittent
rotary motion, comprising in its construction a circular disc having a circumferential
recess forming a ratchet tooth, a concentrically curved blade or lid adapted to cover or
uncover the said recess, a pawl attached to a pulley or equivalent rotary part and
adapted to slide over the circumference of the said dise, and means for reversing the
position of the said blade or lid, substantially as described.
7. The combination of pulley A, pawl C, and spring D, with driving shaft B
disc E spring F and pin G, with nose and mechanism for controlling the position of
the said nose, substantially as described.
8. The combination of disc E, with forked lever H having a nose and a brake h¹,
substantially as described.
9. The combination of disc E with forked lever H, and a treadle mechanism
adapted to act on the lever H, substantially as described.
CARL LOUIS LASCH.
By Fairfax & Wetter,
433, Strand, W.C.,
Patent Agents.