AN IMPROVED COMPOSITION FOR THE MANU- FACTURE OF PRINTERS' INKING ROLLERS
Year: 1879

page_text: LETTERS PATENT to Edwin Thomas Marler, of Dulwich, in the County of
Surrey, for the Invention of "AN IMPROVED COMPOSITION FOR THE MANU-
FACTURE OF PRINTERS' INKING ROLLERS."
Sealed the 11th July 1879, and dated the 21st March 1879.
PROVISIONAL SPECIFICATION left by the said Edwin Thomas Marler at the
Office of the Commissioners of Patents on the 21st March 1879.
EDWIN THOMAS MARLER, of Dulwich, in the County of Surrey.
COMPOSITION FOR THE MANUFACTURE OF PRINTERS' INKING ROLLERS."
"AN IMPROVED
This Invention relates to an improved composition for the manufacture of
printers' inking rollers, and is designed to obviate various defects existing in such
rollers as heretofore made.
Printers' inking rollers of which glycerine is a component part possess great
advantages in comparison with those in which there is no glycerine, but by reason
of the property in glycerine causing it to attract surrounding moisture, such rollers
are liable to become tender on the face and to fret at the ends, or to become so
strongly marked by the type and rules as to be practically useless, and to distribute
the ink very unevenly. These results cause annoyance, delay, and consequent loss.
The object of my said Invention is to provide means for obviating these defects
without sacrificing the advantages resulting from the use of glycerine, and to pro-
duce rollers superior to any of the composition rollers heretofore in use by means of
a combination of ingredients which when cast into printers' inking rollers shall have
an affinity for printers' ink, will not be affected by the dampness of the atmosphere
or the condition of the room in which the rollers are worked, will be able to with-
stand heat and friction, will not dry, sbrink, or crack on the surface, and will
therefore remain practically of the same diameter as when cast, and which when
necessary will be capable of being readily re-melted and re-cast into rollers.
I carry my said Invention into practice as follows, that is to say:-I take of glue,
32 parts; glycerine, 56 parts; sugar or other saccharine matter, 12 parts; and of
pure india-rubber dissolved in naphtha, oil of turpentine, or any other suitable

page_text: chemical solvent, 10 parts. Having first soaked the glue for a period ranging from
40 minutes to 2 hours, according to the state of the temperature (more time being
required when the temperature is low than when it is high), I draw off the water
and allow the glue to remain in that condition for at least 12 hours; I take the
glycerine and placing it in a steam jacketted kettle or other convenient vessel raise
it to boiling point, and then proceed to add one half of the glue, then the sugar or
other saccharine matter, then the remainder of the glue, stirring without intermis-
sion and keeping up the heat to fully boiling point; and when these ingredients are
all thoroughly mixed I add the herein before named pure india-rubber solution,
stirring vigorously. When all are well mixed I draw off the composition either into
moulds prepared for printers' rollers, or into conveniently sized slabs for storing for
future use. The proportions of the ingredients may be slightly varied, and also the
order of admixture, without departing from the principle of my Invention, but
should be substantially as above described.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Edwin Thomas Marler in the Great Seal Patent Office on the 20th
September 1879.
"
EDWIN THOMAS MARLER, of Dulwich, in the County of Surrey. AN IMPROVED
COMPOSITION FOR THE MANUFACTURE OF PRINTERS' INKING ROLLERS."
This Invention relates to the manufacture of printers' inking rollers, and is
designed to obviate various defects existing in such rollers as heretofore made.
Printers' inking rollers of which glycerine is a component part possess great advan-
tages in comparison with those in which there is no glycerine, but although such
rollers afford generally very satisfactory results, yet by reason of the property in
glycerine causing it to attract surrounding moisture in certain conditions of the
atmosphere, such rollers are to some extent liable to become tender on the face and
to fret at the ends, and in some cases to become marked by the type and rules, so
that they distribute the ink somewhat unevenly.
The object of my said Invention is to provide means for obviating these defects
without sacrificing the advantages resulting from the use of glycerine, and to
thereby produce rollers superior to any of the composition rollers heretofore in use.
I accomplish this object by means of a combination of pure india rubber with other
ingredients, thereby forming a composition or compound which when cast into
printers' inking rollers will have an affinity for printers' ink, will not be affected by
the dampness of the atmosphere or the condition of the room in which the rollers
are worked, will withstand heat and friction, will not dry, shrink, or crack on the
surface, and will therefore remain practically of the same diameter as when cast,
and which when necessary will be capable of being readily remelted and recast into
rollers.
I wish it understood that by the term pure india rubber I refer to india-rubber
or caoutchouc which has not been prepared by the addition of sulphur or other
foreign matter.
I prefer to carry my said Invention into practice as follows, that is to say :--I
take of ordinary glue thirty two (32) parts; glycerine, fifty six (56) parts; sugar or
other saccharine matter, twelve (12) parts; and of pure india-rubber dissolved in
naptha, oil of turpentine, or any other suitable solvent, ten (10) parts. Having first
soaked the glue for a period ranging from forty (40) minutes to two (2) hours,
according to the state of the temperature (more time being required when the tem-
perature is low than when it is high), I draw off the water and allow the glue to
remain for at least twelve (12) hours; I then take the glycerine, and placing it in
a steam jacketted kettle or other convenient vessel raise its heat to the boiling
point, and then proceed to add one half of the above named quantity of glue, then
the sugar or other saccharine matter, and then the remainder of the glue, stirring
without intermission and keeping up the heat fully to the boiling point. When
these ingredients are all thoroughly mixed I add the herein before named pure india
rubber solution, while stirring vigorously. When all of the ingredients are well
mixed I draw off the composition either into moulds prepared for the manufacture
of printers' rollers, or into conveniently sized slabs to be stored for future use in such
manufacture.
The proportions of the ingredients may be slightly varied, and also the order of
admixture, without departing from the principle of my Invention. These variations
or modifications will depend upon the state of the climate or other circumstances
under which the rollers are to be used; for instance, in a dry or hot climate the
quantity of glycerine would have to be increased; and if the rollers are to be used
on a very rapid machine, the quantity of glue must be increased to compensate for
the increased wear of the surface of the roller; and other changes or modifications
in the composition that may be required.by the particular circumstances under

page_text: which the said rollers are to be employed will be obvious, and may be readily made
by the manufacturers of the said rollers.
I may also combine pure india rubber with other ingredients heretofore used, or
other suitable ingredients, and thereby form a new substance or compound, which
by casting in moulds may be manufactured with printers' rollers.
Having thus fully described my said Invention and the manner of performing
the same, I wish it understood that I claim,-
First. The composition or compound consisting of pure india-rubber or caout-
chouc and the other above named substances or ingredients, combined substantially
in the proportions and in the manner herein specified for the purpose set forth.
Second. A printers' inking roller formed of the above specified composition or
compound.
Third. The manufacture of printers' inking rollers by the use of a composition or
compound of which pure india rubber forms one of the ingredients, and which is
capable of being melted and cast in moulds for the purpose specified.
In witness whereof, I, the said Edwin Thomas Marler, have hereunto set my
hand and seal, this Twentieth day of September, in the year of our Lord
One thousand eight hundred and seventy-nine.