Improvements in Platen Printing Machines.
Year: 1891

page_text: Date of Application. 19th Jan., 1891
Complete Specification Left, 17th Oct., 1891-Accepted, 5th Dec., 1891
PROVISIONAL SPECIFICATION.
Improvements in Platen Printing Machines.
JAMES WINTERTON 20 New Street Carrington Nottingham Mechanic, do hereby
declare the nature of this invention to be as follows:-
My invention relates to platen printing machines having three or more platens
which I make adjustable.
On this class of machine as at present constructed a perfect register cannot be
obtained without handling the paper every time a different colour is to be printed.
My improvements consist in adding one or more type beds with an ink distributing
apparatus, throwing off gear and other usual accessories. These type beds in
addition to the usual parts are fitted with means for adjusting the forme so that it
will give a perfect register with an impression taken from one of the other type
beds, there are also means for regulating the impression.
The machine is so constructed that any one of the type beds may be used by
itself with any one of the platens or with all the platens in rotation, or the whole of
the platens and type beds may be in use at the same time.
By these means I am enabled to print in perfect register an article or paper
having as many different colours. as there are type beds.
Dated this 17th day of January 1891.
WILLIAM HENRY POTTER,
Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Platen Printing Machines.
I, JAMES WINTERTON, of 83 Wellhead Lane, Perry Barr, Birmingham, in the
County of Warwick, Mechanic, 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:-
My invention relates to platen printing-machines having two, three or more
platens.
On machines of this class as at present constructed a perfect register cannot be
obtained without carefully handling and adjusting the paper every time a different
colour is to be printed thereon.
According to my invention I combine in one machine two or more sets of
apparatus each set comprising a type-bed, ink-distributing apparatus, throwing off
gear and other usual accessories. Each type-bed, in addition to the usual parts, is
fitted with means for adjusting the form so that it will give a perfect register with
an impression taken from the other, or one of the other, type-beds; there are also
means for regulating the strength of the impression.
My improved machine is so constructed that either or any one of the type-beds
may be used alone with either or any of the platens, or with all the platens in
rotation, or the whole of the platens and type-beds may be in use at the same time.
By these means I am enabled to print in perfect register on one sheet as many
different colours as there are type-beds.
My said invention is illustrated in the accompanying drawing which shows a side
elevation of a machine provided with a series of rotative platens and two type-beds
and their accessories.
a is a frame of suitable construction for carrying the parts of the machine;
is the crank or driving shaft which is supported in bearings in the said frame;

page_text: cc are the platens and c² is a block to which the said platens are secured and
on which they are adjustable by means of screws c³. I prefer to provide each
platen with four of these screws. The said platens are provided with blanket-
irons and grippers in the usual manner. By making the platens separately and
mounting them adjustably on the block, I provide for very readily adapting the
surface of the platens to that of the "forms" on the type beds. d is a shaft
which carries the platens in such a manner that they can turn independently
about the said shaft. On one end of the shaft d is fixed a wheel or disc e and
on the other end is a gear wheel e¹ driven by a pinion on the driving shaft b.
99 are the type-beds which are carried by oscillating frames 9* mounted on
shafts g extending across the framing. The type beds are oscillated about their
shafts by the wheels or discs e, e¹ through the medium of connecting rods h;
ii are the ink ducts or fountains. jjare the inking rollers, kk are the
roller-carriers or arms pivotted to the type bed frames at k¹ and provided with
springs in the usual manner for keeping the inking rollers properly in contact
with the type. The platens as above specified rotate around the shaft d. They
are moved successively from one type-bed to another to take the different
colours. For this purpose I employ any suitable or well-known means.
For
example I use a hooked rod which is connected to one of the rods or links h
and which engages with the platens to move them successively forward about
their shaft. Or the connection of the hooked rod with the platens may be
modified to move the platens to and fro, instead of rotating them upon the
shaft, when printing with only one colour, so that the machine may be used
either with one platen or two or more platens in operation according to the
character of the work required at any time. To the arms k at 1* are
jointed or pivotted links which are also jointed or pivotted at to the side
of the frame a. The said links hold the arms so that in the movements of
the type-bed the said arms are caused to vibrate about the pivots k¹. m m² m² are
the parts forming the usual throwing-off mechanism of the upper type-bed.
nnn² are the parts forming the throwing off mechanism of the lower type-
bed. This mechanism is in respect of the details of its construction substan-
tially similar to that in the single type-bed machine described in the Specification
of Letters Patent No. 13,188 of A.D. 1886.
In combination with the said platens and with the means for operating the
same I employ means for locking the platens while the impression is being
taken from either of the type beds. For this purpose I prefer to employ arms
pivotted the inside of the framing, these arms being arranged to enter
grooves eending across the ends of the block which carries the platens.
When these grooves come opposite the said arms the latter are forced into the
grooves by springs. A cam fixed on the platen-shaft forces the arms out of
the grooves to release the platens when the impression has been taken. My
improved machine may be operated by a treadle o in the usual manner or by
any convenient power.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is
First. In a printing machine having a series of rotative platens, the combination
with such platens of two or more type-beds and their accessories such as are herein
described for the purposes specified.
Second. The platens mounted upon a rotative block and adjustable upon the same
for the purpose specified.
D
ليمي
1
Dated this 10th day of October 1891.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.