Improvements in Pins for Holding Together Sheets of Paper, such as Lithographs and the like.
Year: 1894

page_text: Date of Application, 20th Apr., 1894
Complete Specification Left, 13th Jan., 1895-Accepted, 23rd Mar., 1895
PROVISIONAL SPECIFICATION.
Improvements in Pins for Holding Together Sheets of Paper, such as
Lithographs and the like.
I, CARL BÜRGIN, of Schaffhausen, in the Republic of Switzerland, Manufacturer,
do hereby declare the nature of this invention to be as follows :—
In order to facilitate the simultaneous cutting of a large number of sheets of
paper with lithographed or printed matter of any kind they are jointly placed upon
pins and in order to ensure the whole of the same being cut to the desired size at
uniform distances apart from the lithographed or printed matter they are furnished
with marks through which the said pins are passed, so that the lithographed or
printed matter of one sheet will exactly cover that of the other. Such pins are
furnished at the blunt ends with plates by means of which they can be retained in
in an erect position.
Heretofore the said pins have been soldered into a hole formed centrally through
the said plate which forms an imperfect connection and is liable to get loose very
soon.
In order to obviate the said defects I form the blunt end of the said pin with a
head adapted to rest in a cup shaped depression formed in the said plate which
closes tightly around the said head and forms a very secure connection of the two
parts. The outer surface of the said plate I form concave so that the edge thereof
only touches when supported and thus placed in an erect position is rendered very
steady.
Annexed drawing illustrates one form of my improved pin and means for making
the same, Fig. 1 being an elevation, Fig. 2 a sectional elevation of the parts
constituting the pin before being finally secured together, Fig. 3 a section of the
means used for securing the pin and plate together, Fig. 4 a plan of the plate
before being secured to the pin, and Fig. 5 a sectional elevation of a pin as
heretofore has been in use.
As will be seen from Fig. 3 of annexed drawing the portion d of the plate a
surrounding the thick part of the pin c is arched downwards, whilst the respective
side of the plate is concaved to such an extent that the highest point of the bed d
will be level with the edge of the plate or nearly so but does not exceed the same.
The concave shape of the said plate thus ensures the pin remaining steady when
erected whilst the arched part d of the pin bed prevents the plate loosing its
concave shape on pressure being exerted from the top.
The pin heretofore in use and shown in Fig. 5, compared with my invention
possesses thus decided defects apart from not being steady when erect, owing to
the solder used to secure the pin in the centrally located hole in the plate generally
projecting therefrom even if the part of the plate around the pin is depressed to
receive the solder. Further the said hole being 'bored through the plate and the
pin getting gradually loose it will drop and leave the plate entirely, which cannot
take place in the pin constructed in accordance with my invention, the plate being
not drilled through. The upper surface being uneven owing to the aforesaid
depression thus does not form a good support for the paper, which in invention
is obviated, the respective surface being perfectly level.
my
The manner in which the pin and plate are intimately secured together so as to
be capable of resistance may be briefly stated as follows:-
The connection takes place by stamping under high pressure. Before connection

page_text: the plate a has the form, as shown in Figs. 2 & 4, i.e. the bed for the head 6 of the
pin projecting cup like from the upper surface. The dies e & f, Fig. 3, which
serve to stamp the plate are so formed as to force the material of the cup shaped
bed radially around the head of the pin and at the same time the bed downwards
whilst the plate itself will arch upwards. This operation takes place under strong
pressure so that the connection between the plate and pin is very intimate and not
liable to become undone.
Improvements in Pius for Holding Together Sheets of Paper, such as
Lithographs and the like.
I, CARL BÜRGIN, of Schaffhausen, in the Republic of Switzerland,
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 :-
In order to facilitate the simultaneous cutting of a large number of sheets of
paper with lithographed or printed matter of any kind they are jointly placed
upon pins and in order to ensure the whole of the same being cut to the desired
size at uniform distances apart from the lithographed or printed matter they are
furnished with marks through which the said pins are passed. so that the
lithographed or printed matter of one sheet will exactly cover that of the other.
Such pins are furnished at the blunt ends with plates by means of which they
can be retained in an erect position.
Heretofore the said pins have been soldered into a hole formed centrally
through the said plate which forms an imperfect connection and is liable to get
loose very soon.
In order to obviate the said defects I form the blunt end of the said pin with a
head adapted to rest in a cup shaped depression formed in the said plate which
closes tightly around the said head and forms a very secure connection of the two
parts. The outer surface of the said plate I form concave so that the edge
thereof only touches when supported and thus placed in an erect position.
The drawing filed with the Provisional Specification illustrates one form of my
improved pin and means for making the same, Fig. 1 being an elevation, Fig. 2
a sectional elevation of the parts constituting the pin before being finally secured
together. Fig. 3 a section of the means used for securing the pin and plate
together. Fig. 4 a plan of the plate before being secured to the più, and Fig. 5 a
sectional elevation of a pin as heretofore has been in use.
As will be seen from Fig. 3 of annexed drawing the portion d of the plate a
surrounding the thick part of the pin c is arched downwards, whilst the respective
side of the plate is concaved to such an extent that the highest point of the bed d
will be level with the edge of the plate or nearly so but does not exceed the
same. The concave shape of the said plate thus ensures the pin remaining steady
when erected whilst the arched part of the pin bed prevents the plate loosing
its coucave shape on pressure being exerted from the top.
The pin heretofore in use and shown in Fig. 5 compared with my invention
possesses thus decided defects apart from not being steady when erect, owing to
the solder used to secure the pin in the centrally located hole in the plate generally
projecting therefrom even if the part of the plate around the pin is depressed
to receive the solder. Further the said hole being bored through the plate and
the pin getting gradually loose it will drop and leave the plate entirely, which

page_text: cannot take place in the pin constructed in accordance with my invention," the
plate being not drilled through. The upper surface being uneven owing to
the aforesaid depression thus does not form a good support for the paper, which in
my invention is obviated, the respective surface being perfectly level.
The manner in which the pin and plate are intimately secured together so as to
be capable of resistance may be briefly stated as follows:-
The connection takes place by stamping under high pressure.
Before connection
the plate a has the form, as shown in Figs. 2 & 4, i.e. the bed for the head 6 of the
pin projecting cup like from the upper surface. The dies e & f, Fig. 3, which
serve to stamp the plate are so formed as to force the material of the cup shaped
hed radially around the head of the pin and at the same time the bed downwards
whilst the plate itself will arch upwards. This operation takes place under strong
pressure so that the connection between the plate and pin is very intimate and not
liable to become undone.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim, is-
1st. A pin for holding together sheets of paper such as lithographs and the like,
the inner end of the pin itself being formed with a head fixed into the bed of a base
plate which tightly embraces the said head, all substantially as described.
2nd. A base plate, as specified in the preceding claim, which is centrally arched
towards the bottom and at the top slightly inclined upwards against the pin so
that the base plate will rest with its edge upon the support, all substantially as set
forth.
Dated this 17th day of January 1895.
F. BOSSHARDT & Co.,
4, Corporation Street, Manchester, Agents to Applicant.