Improvements in Printers' Roller Composition or the like.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in Printers' Roller Composition or the like.
We, WILLIAM JOSEPH JOHN HAWKINS, of 128, Euston Road, in the County of
Middlesex, Manufacturer of Printers' Roller Composition, and OTTO ROBERT
HEINRICH SCHMIDT, of Welton House, S, Park Road, Forest Hill, in the County of
Kent, Merchant, do hereby declare the nature of this invention to be as follows:-
-
The invention relates to improvements in printers roller composition or the like.
It is well known that the composition employed for the manufacture of printers
rollers is much affected by atmospheric changes, that is to say in hot dry weather
it will part with some of its moisture and shrink or contract, whilst in damp
weather, it will take up a considerable proportion of moisture and correspondingly
swell and these variations are so pronounced that it is necessary to frequently
regulate the bearings of the rollers in order to compensate therefor.
Now the object of the present invention is to obtain a composition which will
be less affected or remain unaffected by the condition of the atmosphere, thereby
removing or modifying the difficulty above pointed out.
In carrying the present invention into effect the composition is composed mainly
of well known ingredients such as glue, water, glycerine and sugar, but according
to the present invention a suitable proportion of mica in a finely divided state
is incorporated therewith.
The following proportions of the ingredients named have experimentally been
found to answer the purpose in view, but it will be understood that in practice it
may be found that such proportions and more especially that of the mica may be
omad with advantage.
A convenient way of making the composition is first to combine the ingredients
minus the mica in the ordinary way, and then whilst the composition is in a fluid
condition to add the mica thereto, and care must be taken that the same is by
suitable means thoroughly stirred in and mixed with the other ingredients, and
the composition is afterwards run off into moulds or otherwise treated in the
ordinary way.
As a modification of the formula herein before described and in
order to obtain a composition suitable either for an ordinary printers roller or for
a lithographic roller, which latter is required to be impervious to water, the two
ounces of mica before being added to the other ingredients have combined there-
with about twelve ounces of stand-oil but the proportions of either compound
may be varied as may be required.
As a further modification and in order to obtain a compound more especially

page_text: suited for lithographic rollers, the following ingredients are combined in or in
about the proportions stated namely:―
8 8
about the proportions stated namely:
वाट сошотпneu I or III
Gluc
Water
Glycerine
Shellac or other suitable gum insoluble in water
Mica
"Standoil"
7 pounds
3
"
(about)
-
5
-
رو
14 ounces (dissolved in
about one pint of
methylated spirit)
2 ounces
"
and after being submitted to further mixing the composition is ready to be
employed for printers rollers or for lithographic rollers or other surfaces.
In order further to toughen the composition it may sometimes be advantageous
to employ in lieu of or in addition to the shellac about two ounces of chloride of
sulphur or borax.
Composition of this character possesses many advantages amongst which may be
named that it is practically impervious to or non-absorbent of moisture, is not
materially affected by considerable heat, is exceedingly tough, more durable than
other compositions whilst at the same time the qualities necessary in a printers
roller remain unimpaired and it is especially suitable for lithographic work.
Although the invention is herein before described in connection with printers
and lithographic rollers it will be understood that it is equally applicable to similar
compositions employed in the manufacture of the well known gelatinous printing
surfaces.
It will be understood that the proportions of the ingredients may be more or less
varied without departing from the spirit of the invention.
Dated this 19th day of June 1907
"
and after being submitted to further mixing the composition is ready to be
employed for printers rollers or for lithographic rollers or other surfaces.
In order further to toughen the composition it may sometimes be advantageous
to employ in lieu of or in addition to the shellac about two ounces of chloride of
sulphur or borax.
Composition of this character possesses many advantages amongst which may be
named that it is practically impervious to or non-absorbent of moisture, is not
materially affected by considerable heat, is exceedingly tough, more durable than
other compositions whilst at the same time the qualities necessary in a printers
roller remain unimpaired and it is especially suitable for lithographic work.
Although the invention is herein before described in connection with printers
and lithographic rollers it will be understood that it is equally applicable to similar
compositions employed in the manufacture of the well known gelatinous printing
surfaces.
It will be understood that the proportions of the ingredients may be more or less
varied without departing from the spirit of the invention.
Dated this 19th day of Jun 1907
WHITE & WOODINGTON,
27, Southampton Buildings, London, Agents.
Improvements in Printers' Roller Composition or the like.
We, WILLIAM JOSEPH JOHN HAWKINS, of 128, Euston Road, in the County of
Middlesex, Manufacturer of Printers' Roller Composition, and OTTO ROBERT
HEINRICH SCHMIDT, of Welton House, S, Park Road, Forest Hill, in the County of
Kent, Merchant, 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:-
The invention relates to improvements in printers roller composition or the like.
It is well known that the composition employed for the manufacture of printers
rollers is much affected by atmospheric changes, that is to say in hot dry weather
it will part with some of its moisture and shrink or contract, whilst in damp
weather, it will take up a considerable proportion of moisture and correspondingly
swell, and these variations are so pronounced that it is necessary to frequently
regulate the bearings of the rollers in order to compensate therefor.
Now the object of the present invention is to obtain a composition which will.
be less affected or remain unaffected by the condition of the atmosphere, thereby
removing or modifying the difficulty above pointed out, and rendering the same

page_text: either suitable for ordinary printers rollers or for lithographic rollers, which. latter
are required to be impervious to water.
In carrying the present invention into effect the composition is composed mainly
of well known ingredients, such as glue, water, glycerine, and sugar, and to these
is added a suitable proportion of mica in a finely divided state combined with
66 standoil or other suitable oxidized oil, and sometimes shellac or other suitable
gum insoluble in water.
1.
The following formula-has experimentally been found to answer for certain
purposes, but it will be understood that in practice it may be found that such
proportions may be varied with advantage.
Glue
Water
Glycerine
Sugar
-
7 pounds
3 to 7 pounds
7 pounds
"
2 ounces
"
Mica (in a finely divided state).1-
Standoil (or other suitable oxidized oil)*
12 "
A convenient way of making the composition is first to combine the ingredients
minus the mica and "standoil or the like in the ordinary way, and then to com-
bine the mica with the “standoil" or the like by thoroughly mixing the same
therewith, and whilst the composition is in a fluid condition to add the mica and
66 standoil or the like thereto, care being taken that the entire mass is by suitable
means thoroughly stirred and mixed after which the composition is run off into
moulds or otherwise treated in the ordinary way.
The composition above described is particularly suitable for printers rollers
inasmuch as it is less affected by atmospheric influence than similar compositions,
more easily cleansed from printers ink, more durable, gives better results in
printing, and consequently for commercial purposes possesses increased value.
As a modification, and in order to obtain a compound suitable for lithographic
rollers, the following ingredients are combined in or in about the proportions
stated, namely;
;-

page_text: Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed we declare that what we
claim is:
1. A composition suitable for the manufacture of printers rollers, lithographic
rollers, or like surfaces, consisting in the combination with the usual ingredients
of roller composition of powdered mica and standoil or other suitable oxidized oil
in suitable proportions substantially as herein described and for the purpose stated.
2. A composition suitable for the manufacture of printers rollers, lithographic
rcllers, or like surfaces, consisting in the combination with the usual ingredients
of roller composition of powdered mica, standoil, or other suitable oxidized oil
and shellac or other suitable gum insoluble in water in suitable proportions sub-
stantially as herein described and for the purpose stated.
THID
uwy
WHITE & WOODINGTON,
Rooms 221-225, Birkbeck Bank Chambers,
Southampton Buildings, London, Agents.
WHITE & WOODINGTON,
Rooms 221-225, Birkbeck Bank Chambers,
Southampton Buildings, London, Agents.