Manufacture of Material for Stereotype Matrices.
Year: 1899

page_text: Date of Application, 9th Feb., 1899
Complete Specification Left, 27th Oct., 1899-Accepted, 30th Dec.,
1899
PROVISIONAL SPECIFICATION.
Manufacture of Material for Stereotype Matrices.
I, OLIVER IMRAY, of Birkbeck Bank Chambers, Southampton Buildings,
Chancery Lane, in the County of London, Chartered Patent Agent, do hereby
declare the nature of this invention (as communicated to me from abroad by
Alfred Tiano, of 24, Rue de la Chaussée, d'Antin, Paris, France, Merchant)
to be as follows: -
This invention relates to the manufacture of a material for stereotype matrices
consisting of sheets of paper-like substance which, in a dry condition, being
pressed upon a printing forme receive intaglio impressions and can then at once
without any diving or other treatment, be put in casting boxes and have the
molten stereotype metal poured upon them
For this purpose, papers, preferably those made from rags, which may have
been written or printed on, or other suitable paper-making material, are torn
up and pulped with caustic soda Ive of about 9° to 10° Bé The pulp, after being
washed and treated as for paper making, is deposited in a rather thick laver
upon a travelling web of fine wire gauze. The layer is carried under another
travelling web of wire gauze by which it is somewhat compressed and rendered
even It is then received on a travelling web of felt and by it carried on to a
travelling web of suitable fabric by which it is passed under a number of hot
1ollers, becoming thus died and made into a coherent sheet. This sheet then
passes under a hot and a cold roller and over a brush which revolves partly
immersed in a mixture of kaolin and finely pulverised tale suspended in thin
mucilage, and thus receives a coating on one side which is allowed to dry in the
air or is dried by again passing the sheet over a hot roller. Finally the sheet is
cut into pieces of convenient size The mucilage which causes the mineral
material to adhere to the sheet may be of various kinds, such as starch or dextrin,
it is found however that a mucilage obtained by boiling in water the seeds of the
quince fruit answers well.
The sheets prepared as above described have only to be pressed on a printing
forme to be ready for receiving the molten stereotype metal. A convenient way
of pressing
to place the sheet upon the forme on a sliding table and pass both
under a pressing roller.
°
The sheets after having been used as matrices may form part of the matérial
employed for making fresh sheets.
It is advantageous to keep the prepared sheets in damp air, or the pulp may
have added to it some hygroscopic material such as calcium chloride so as to
keep the sheets somewhat damp.
Dated this Oth da of Fahman1900
ABEL & IMRAY,
Agents for the Applicant.

page_text: declare the nature of this invention (as communicated to me-fiom. abroad by
Alfred Tiano, of 24, Rue de la Chaussée d'Antin, Paris, France, Merchant),
and in what manner the same is to be performed to be particularly described and
ascertained in and by the following statement.-
This invention relates to the manufacture of a material for stereotype matrices
consisting of sheets of paper-like substance which in a dry condition, being
pressed upon a printing forme receive intaglio impressions and can then at once,
without any drving or other treatment, be put in casting boxes and have the
molten stereotype metal poured upon them.
on to a
For this purpose, papers, preferably those made from rags about rds cotton
and d. linen which may have been written or printed on, or other suitable
paper-making material, free from wood fibre, are torn up and pulped with caustic
soda lve of about 7° to 9° Beaumé for short fibred material, and 9° to 12° for
long bred material. When rags are used a stronger solution of caustic soda
such as one of 220 Beaumé may be employed. The pulping process may be
hastened by heating the caustic lve The pulp, after being washed and treated
as for paper making, is deposited in a rather thick layer upon a travelling web
of fine wire gauze
The laver is carried under another travelling web of wire
gauze by which it is somewhat compressed and rendered even It is then
received on a travelling web of felt and by it carried
travelling web of suitable fabric, such
as open canvas, by which it
is passed under a number of hot rollers, becoming thus dried and made into
a coherent sheet This sheet then passes under a hot and a cold roller and over a
brush which revolves partly immersed in a mixture of kaolin and finely pulverised
tale suspended in thin mucilage, and thus receives a coating on one side which is
allowed to diy in the air or is dried by again passing the sheet over a heated
roller Finally the sheet is cut into pieces of convenient size The mucilage
which causes the mineral material to adhere to the sheet may be of various kinds,
such as starch or dextrin: it is found however, that a mucilage obtained by
boiling in water the seeds of the quince fruit answers well.
The sheets prepared as above described have only to be pressed on a printing
forme to be ready for receiving the molten stereotype metal A convenient way
of pressing is to place the sheet upon the forme on a sliding table and pass both
under a pressing roller
The sheets having been used as matrices may form part of the material
emploved for making fresh sheets.
Having thus described the nature of this invention and in what manner the
same is to be performed, I here declare that 1 am aware of the Specification
No. 13114 of 1895 in which is described a process resembling in some respects
that herein described, and I make no claim to anything set forth in the said
specification, but what I claim is -
1. Manufacture of material for stereotype matrices by pulping paper or other
suitable paper making material, fice from wood fibre, with caustic soda lye,
washing the pulp, making it into a thick paper and coating this paper with an
incombustible material, substantially as described.
2 Material for stereotype matrices manufactured as above set forth
Dated this 27th day of October 1899
ABEL & IMRAY,
Agents for the Applicant..