Method of Producing Foot-plates for Electrotypes, Stereotypes, and the like, and Foot-plates thus Produced.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Method of Producing Foot-plates for Electrotypes, Stereotypes, and
the like, and Foot-plates thus Produced.
We, WERNER LANDGREN, Mastersamuelsgatan 51, Stockholm, Sweden, Secre-
tary, and VIGGO HILARIUS HOLM, of Kungsholms Kyrkoplan 4, Stockholm,
Sweden, Printer, do hereby declare the nature of this invention to be as follows:-
It is well known that foot-plates for electro types and the like have hitherto
been made either of metal or of some firm kinds of wood. Such foot-plates, how-
ever have several disadvantages, for instance, the foot-plates of metal are too
expensive, and the foot-plates of wood easily change their form (especially when
exposed to moisture), so that the printing surface curves or casts. The fastening
of the electro type on the piece of wood is also connected with difficulties and
danger of spoiling the printing surface. Further, the wooden blocks have the
disadvantage that they give way to the pressure and are also too expensive to
manufacture.
This invention consists, briefly, in producing a suitable composition and in
forming the same to a block and fastening the same to the electro-
type by casting the composition onto the back of the electrotype. The
procedure may suitably be as follows: resin, pitch or the like, is melted together
with shellac, boiled linseed oil, or other oily and tenacious material, such as india
rubber, stearine, or oil, and when the resin, pitch or the like, has melted, plaster
of Paris, Portland cement, or burnt clay, or the like is added.
The said com-
position is thereupon poured into a suitable mould on the back of the electro-
type so that the said composition forms a foot-plate.
Good results have been obtained by melting 50-100 parts by weight of resin
together with 50-100 parts of shellac and 5-20 parts of boiled olive-oil, stearine,
tar, or the like, and, when the resin is melted, put 100-300 parts of plaster of
Paris and 20-60 parts of Portland cement or both of these materials to the mix-
ture, which is thereupon stirred up to a homogeneous mass;
The composition thus obtained is poured in a suitable mould over the back of
the electro-type. The mould should be-made of a depth to give the right thick-
ness of plate as well as the right length and width. After the mould has been
filled the rest of the composition is removed so that the mould will be filled just
to the edges and is thereupon left to harden. After being hardened the electro-
type is ready for use.
The following proportions of the composition have by experience been found
to give the best results :-
50 parts of resin;

page_text: former may be provided with screws, hooks or other suitable projections entering
into the mass poured upon the electro-type.
Electro types or stereo-types with foot-plates produced in the aforesaid manner
distinguish themselves over those on blocks of wood in that they do not change
their form, even if exposed to pressure or moisture, that they have a greater
resistance against wear, that it is easy, to obtain right angles, as they completely
obtain the form of the back of the electrotype, and that they are much cheaper
to make. A further advantage of this method is that no place need be occupied
at the sides of the electro-type by nails or the like for fastening the electro-type
to the foot-plate as hitherto has been customary. i
Though the best results have been obtained by using the materials specified,
the composition may be altered without departing from the spirit of this inven-
tion. So may for instance, the shellac be left out.
Method of Producing Foot-plates for Electrotypes, Stereotypes and
the like, and Foot-plates thus Produced.
We, WERNER LANDGREN, Mästersamuelsgatan 51, Stockholm, Sweden, Secre-
tary, and VIGGO HILARIUS HOLM, of Kungsholms Kyrkoplan 4, Stockholm,
Sweden, Printer, 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:-
It is well known that foot-plates for electro types and the like have hitherto
been made either of metal or of some firm kinds of wood. Such foot-plates, how-
ever, have several disadvantages, for instance, the foot-plates of metal are too
expensive, and the foot-plates of wood easily change their form (especially when
exposed to moisture), so that the printing surface curves or casts. The fastening
of the electro type on the piece of wood is also connected with difficulties and
danger of spoiling the printing surface. Further the wooden blocks have the
disadvantage that they give way to the pressure and are also too expensive to
manufacture.
This invention consists, briefly, in producing a suitable composition and in
forming the same to a block and fastening the same to the electro-
type by casting the composition on to the back of the electrotype. The
procedure may suitably be as follows:-resin, pitch or the like, is melted together
with shellac, boiled linseed oil, or other oily and tenacious material, such as india
rubber, stearine, or oil, and when the resin, pitch or the like, has melted, plaster
of Paris, Portland cement, or burnt clay, or the like; is added. The said com-
position is thereupon poured into a suitable mould on the back of the electro-
types so that the said composition forms a foot-plate..
Good results have been obtained by melting 50-100 parts by weight of resin
together with 50-100 parts of shellac and 5-20 parts of boiled olive oil, stearine,
tar or the like, and, when the resin is melted, 100-300 parts of plaster of Paris
and 20-60 parts of Portland cement or both of these materials are added to the
mixture, which is thereupon stirred up to a homogeneous mass.

page_text: The composition thus obtained is poured in
suitable mould over the back of
the electro-type. The mould should be made of a depth to give the right thick-
ness of plate as well as the right length and width. After the mould has been
filled the rest of the composition is removed so that the mould will be filled just
to the edges and is thereupon left to harden. After being hardened the electro-
type is ready for use.
The following proportions of the composition have by experience been found
the electro-type. The mould should be made of a depth to give the right thick-
ness of plate as well as the right length and width. After the mould has been
filled the rest of the composition is removed so that the mould will be filled just
to the edges and is thereupon left to harden. After being hardened the electro-
type is ready for use.
The following proportions of the composition have by experience been found
to give the best results:—
50 parts of resin ;
75
2
175
"
"
"
"
shellac ;
stearine and
plestor
of Paris
In order to provide against loosening of the electro-type from the foot-plate, the
former may be provided with screws, hooks or other suitable projections entering
into the mass poured upon the electre type.
Electro types or stereo-types with foot-plates produced in the aforesaid manner
distinguish themselves over those on blocks of wood in that they do not change
their form, even if exposed to pressure or moisture, that they have a greater
resistance against wear, that it is easy to obtain right angles, as they completely
obtain the form of the back of the electrotype, and that they are such cheaper
to make. A further advantage of this method is that no place need be occupied
at the sides of the electro-type by nails or the like for fastening the electro-type
to the foot-plate as hitherto has been customary.
Though the best results have been obtained by using the materials specified,
the composition may be altered without departing from the spirit of this inven-
tion. So may for instance the shellac be left out.
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. A backing or foot plate for electro-types, stereotypes and the like produced
by the melting together of resin, pitch or the like substance in admixture with
shellac, and an oily and tenacious substance, such as linseed oil, stearine, olive
oil, tar, india-rubber or the like in admixture with gypsum, Portland cement,
burnt clay or similar substance.
2. Backing or foot-plates for electro-types, stereotypes and the like produced
substantially in the manner described.
1000
In order to provide against loosening of the electro-type from the foot-plate, the
former may be provided with screws, hooks or other suitable projections entering
into the mass poured upon the electro type.
Electro types or stereo-types with foot-plates produced in the aforesaid manner
distinguish themselves over those on blocks of wood in that they do not change
their form, even if exposed to pressure or moisture, that they have a greater
resistance against wear, that it is easy to obtain right angles, as they completely
obtain the form of the back of the electrotype, and that they are such cheaper
to make. A further advantage of this method is that no place need be occupied
at the sides of the electro-type by nails or the like for fastening the electro-type
to the foot-plate as hitherto has been customary.
Though the best results have been obtained by using the materials specified,
the composition may be altered without departing from the spirit of this inven-
tion. So may for instance the shellac be left out.
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. A backing or foot plate for electro-types, stereotypes and the like produced
by the melting together of resin, pitch or the like substance in admixture with
shellac, and an oily and tenacious substance, such as linseed oil, stearine, olive
oil, tar, india-rubber or the like in admixture with gypsum, Portland cement,
burnt clay or similar substance.
2. Backing or foot-plates for electro-types, stereotypes and the like produced
substantially in the manner described.
CRUIKSHANK & FAIRWEATHER,
Chartered Patent Agents, 62, Saint Vincent Street, Glasgow,
Agents for the Applicants.