Improvements in Blocking or Printing in Gold, Silver, or other Powders.
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
Improvements in Blocking or Printing in Gold, Silver, or other
Powders.
NATHANIEL BOTT CHADWICK, of 64, Bramall Lane, Stockport, in the County
of Chester, Engineer, and THOMAS ROWBOTHAM, of Shaw Villa, Stockport, in
the County of Chester, Engineer, do hereby declare the nature of this invention
to be as follows;-
-
This invention relates to an improved method of blocking or printing with
gold, silver, or other similar powders. Instead of the usual method of using
metal leaf and dusting with gum to make such leaf to adhere, or printing with
varnish or ink and dusting over with powder before the varnish or ink has had
time to dry, we purpose doing this by feeding the powders or colours on to a
forme, block, or roller which is first heated to a suitable dgree. We cover
the board or other substance to be blocked or printed with a coating or varnish
that will melt under the heat of the forme, block or roller and thus cause the
powder to adhere in the design required. To make the forme, block or roller
take up an even coating of the bronze or powder we use a little oil or other
suitable substance that will cause the powder to adhere to the same until the
pressure is applied, when the powder will freely transfer to the material to be
printed.
This invention can be applied to the present blocking presses, or platen,
web, or any circular printing, embossing, or any similar machine for gold,
silver, or colour blocking, of paper, cardboard, bookcloth, leather, wall-paper
or any substance requiring such blocking or printing, either in sheets or con-
tinuous lengths, and can also be used for hand tools in bookbinding.
Dated this 22nd day of August 1899.
Improvements in Blocking or Printing in Gold, Silver, or other
Powders.
We, NATHANIEL Bott Chadwick, of 64, Bramall Lane, Engineer, and THOMAS
ROWBOTHAM, of Shaw Villa, Engineer, both of Stockport, in the County of
Chester, 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:-
This invention relates to an improved method of blocking or printing with
gold, silver or other similar powders.

page_text: Instead of using as hitherto metal leaf and dusting with gum to make such
leaf adhere to the design, or printing the latter with varnish or ink and dusting
over with powder before the varnish or ink has had time to. dry, according to
our invention we feed the powders or colours on to a form, block or roller fur-
nished with the design to be blocked or printed and heated to a suitable degree.
The board or other substance or material to be blocked or printed we cover
with a coating or varnish that will melt under the heat of the said form, block
or roller and thus cause the powder to adhere in the design required, or we may
mix the coating of colour or preparation used in coating such board or sub-
stance or material with a substance that will melt under the heat of the form,
block or roller.
To make the form, block or roller take up an even coating of the bronze or
powder, we use a little oil, wax or other suitable substance that will cause the
powder to adhere to the same until the pressure is applied when the powder will
freely transfer to the board or other substance or material to be printed.
This invention can be applied to the present blocking presses or platen, web
or any circular printing, embossing or other similar machine for gold, silver
or colour blocking of paper, cardboard, bookcloth, leather, wall paper, or any
substance or material requiring such blocking or printing either in sheets or
continuous lengths and can also be used for hand tools in bookbinding.
And in order that our invention may be more fully understood we have caused
to be appended hereunto one sheet of drawings marked with letters of reference
indicating like parts in the various figures and showing as an example two
different ways of using our improved method of blocking or printing with gold,
silver or other powders.
Referring to Fig. 1, in using our improved method for example in connection
with a hand blocking press, we mount on the sliding blocking or printing table a
two rollers b & c. The front roller we supply with oil, wax or the like sub-
stance and the back roller c we feed with gold, silver or other powder from a
trough d.
The form or block e furnished with the design to be blocked or printed on
board or other substance or material placed on the table a, is in the usual, or
any other suitable way heated, say by gas jets f.
The blocking or printing surface of the form or block may be first oiled or
greased and then powdered, by raising the table a by means of the lever g and
cams into the position shown in the drawing and afterwards drawing by
means of the sliding table a the rollers & across the said surface, so as to
cause the roller b to leave a slight amount of oil, wax or the like substance ou
the design and the roller c to immediately coat it with powder.
By means of the lever g the table a is afterwards lowered sufficient to allow
the said rollers of being returned to their original position without touching the
design on the form or block and the board or other substance or material to
be blocked or printed upon, is then raised by the said lever against the form of
block and the impression thus taken.
In using our improved method for example in connection with a rotary or con-
tinuous type or blocking or printing machine we may employ the powder and
oil wax or the like rollers c & b against the blocking or printing roller e of such
machine as shown in Fig. 2 whilst the roller b may be arranged to be fed with
oil wax or the like substance from a trough i.
'
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 :-
1st. The improved method or blocking or printing with gold, silver or other
powders, herein before described, consisting in coating the printing surface of
the form, block or roller suitably heated, with gold, silver or other powder and
the surface of the board or other substance or material to be blocked or printed ou

page_text: by the said form, block or roller, with a varnish or substance that will melt
under the heat of the said form, block or roller and cause the powder on the
latter to adhere to the board, substance or material in the design required, all
substantially as set forth.
2nd. In the method of blocking or printing with gold, silver or other powders
specified in the preceding claim, coating the printing surface of the heated form,
block or roller with oil, wax or the like substance previous to being coated with
gold, silver or other powder, all substantially as and for the purpose set forth.
Dated this 1st day of Nov 1000
F. BOSSHARDT & Co.,
4 Corporation Street, Manchester,
Agents to Applicants.