Improvements in Printers' Roller Composition.
Year: 1890

page_text: Date of Application, 2nd Sept., 1890
Complete Specification Left, 29th May, 1891-Accepted, 1st Aug., 1891
PROVISIONAL SPECIFICATION.
Improvements in Printers' Roller Composition.
We, WILLIAM JOSEPH JOHN HAWKINS of 128 Euston Road in the County
of Middlesex, Manufacturer of Printers Rollers and JAMES HENRY STACEY of
7, Wagner Street in the County of Surrey Traveller do hereby declare the nature
of this invention to be as follows :-
The invention relates to improvements in printers roller composition.
One of the principal ingredients in this material as at present manufactured is
glycerine and it is found in practice that this material does not possess a sufficient
affinity for the printers ink, but is actually repellent thereof and the rollers do not
therefore efficiently pick up and distribute the same.
Now according to our invention we dispense with the use of glycerine as a
component part of the composition and we employ in lieu thereof other materials
which obviate the defect above pointed out and render the composition more
suitable for the requirements of the printer.
For this purpose we employ glue or gelatine and treacle or sugar in about the
usual proportions or glue or gelatine alone and combine therewith potash, linseed,
or other suitable oil, turpentine, resin, starch or soap or other material having a
like effect separately or in combination in suitable proportions and we may add
thereto any suitable material or materials for giving a body to the composition or
otherwise.
By these means we obtain a composition which will have an affinity for the
greasy printers ink and will therefore pick up and distribute the same much more
efficiently than will the compositions at present in use, and which will at the same
time remain unaltered by atmospheric changes.
Dated this 2nd day of September 1890.
WHITE & WOODINGTON,
27, Southampton Buildings, London, Agents.
COMPLETE SPECIFICATION.
Improvements in Printers' Roller Composition.
We, WILLIAM JOSEPH JOHN HAWKINS of 128 Euston Road in the County
of Middlesex Manufacturer of Printers Rollers and JAMES HENRY STACEY of
7 Wagner Street in the County of Surrey Traveller 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.
One of the principal ingredients in this composition as at present manufactured
is glycerine and it is found in practice that this material does not possess a sufficient
affinity for the printers ink but is actually repellent thereof, and the rollers do not
therefore efficiently pick up and distribute the same.
Now according to our invention we dispense with the use of glycerine as a
component part of the composition and we employ in lieu thereof other materials
which obviate the defect above pointed out and render the composition more
suitable for the requirements of the printer.
For this purpose we employ glue or gelatine and treacle or sugar in about the
usual proportions or glue or gelatine alone and combine therewith potash, linseed
or other suitable oil, resin or other material having a like effect separately or in

page_text: Calcium chloride or potash
Powdered resin (if required)
2
In combining these ingredients the glue is first allowed to take up the water and
is then dissolved by the aid of heat in the manner well understood and the linseed
oil which has been previously heated to about 150° Fahrenheit is then very
gradually added to and thoroughly incorporated with the melted glue by rousing
or stirring.
When these ingredients are thoroughly amalgamated the glue or treacle is
gradually added to the mass which is maintained at a suitable temperature; the
chloride of calcium or potash (or it might be a combination thereof) is then
incorporated therewith and if a tough composition is required the powdered resin
which has been previously dissolved by the aid of heat in a small quantity of
linseed oil is added, the mass being thoroughly roused or stirred during the
entire process.
The calcium chloride or potash is employed in order to keep moist or prevent the
drying up of the composition, and the proportions thereof and of the resin may be
varied according to the character of the climate in which the composition is to be
used or the nature of the work to which it is to be applied.
In some cases we may dispense with the treacle or sugar and employ the glue
or gelatine alone in combination with the oil and some others of the ingredients.
When it is desired to give body to the material a suitable proportion (say for
example a quarter of a pound with reference to the above formula) of Paris whito,
litharge or other suitable material may be added to the composition.
The formula bereinbefore given is especially adapted for the manufacture of
composition to be employed for printers rollers used in typographic printing but
when making a composition for printers rollers to be employed for lithographic
printing and which is required to be more completely nonabsorbent of water, we
dispense with the calcium chloride or potash or both in the above formula and
substitute therefor about half an ounce of bismuth carbonate and if required a
quarter of a pound of beeswax.
By these means we obtain a composition which will have an affinity for the
greasy printers ink nud will therefore pick up and distribute the same much more
efficiently than will the compositions at present in use and which will at the same
time remain unaltered by atmospheric changes.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, wo declare that what
we claim is —
A composition for the manufacture of printers rollers consisting of the ingredients
hereinbefore given in or in about the proportions stated.
Dotad this 50th day of May 1001
WHITE & WOODINGTON,
27, Southampton Buildings, London, Agents.