Improvements in and relating to Inking Mechanism for Platen Printing Machines.
Year: 1892

page_text: Date of Application, 17th Oct., 1892
Complete Specification Left, 17th July, 1893-Accepted, 2nd Sept., 1893
PROVISIONAL SPECIFICATION.
Improvements in and relating to Inking Mechanism for Platen
Printing Machines.
I, PETER HOOKER, of Pear Tree Court, Farringdon Road, London, E.C.
Engineer, do hereby declare the nature of this invention to be as follows:-
My invention relates to improvements in inking mechanism for job platen
printing machines, in which the platen is operated by means of a cam and levers
or similar mechanism and which have a swinging or oscillating type bed. My
invention may, however, be applied to other types of machine than those mentioned
without departing from the spirit thereof.
My invention has for its object the provision of a means, when so desired, for
preventing the "forme" from being inked when the impression is "thrown off,"
or by means of which the "forme may be inked and the machine run so that
the ink upon the "forme " may not be transferred upon the sheet.
My invention also consists in the provision of a novel mechanism whereby the
"forme" may be double inked.
To this end my invention consists in the details and combinations of parts.
hereinafter described.
In order to prevent the "forme" from being inked I provide the bearers with.
movable side irons in or upon which the inking rollers are carried. The said side
frames are suspended from a suitable point or pivot upon the framing and when
the machine is in use the inking rollers bear against the face of the type, the said
inking rollers being operated in the ordinary and well known manner.
When the impression is thrown off by the lever in the ordinary way the side
irons before referred to are caused to project beyond the face of the bearers
thereby shifting the carriage of the inking rollers and preventing the said rollers
bearing against the "forme."
The said movement of the side irons is accomplished by the following
mechanism:
an
Upon the journal of the throwing-off lever I provide a disc having a segmental
slot formed therein. In the said slot is engaged a pin upon a connecting rod the
other end of which rod is attached to one arm of a bell-crank lever fulcrummed
upon the side frame of the machine, the other arm of said lever has a connecting
rod loosely attached thereto the end of said rod forming the junction with the
bell-crank being normally co-axial with the pivot of the movable carriage of the
type bed. The said connecting rod operates the movable side irons of the bearers
through a second bell-crank lever or other mechanism attached thereto; the several
parts being adjusted in such a manner that the throwing-off lever through the
connected parts just described shall cause the side irons forming the roller bearers
to be moved forward from the face of the "forme" in the manner before
described.
In order that the ink may be transferred to the face of the type from the inking
plate when the impression is thrown off I provide the segmental slot in the disc
before mentioned with a radial notch into which the pin upon the connecting rod
may be dropped when the impression is thrown off, this causing the mechanism
previously described to resume their inking position which is occupied by the
same when the machine is in operation thereby allowing the ink to be evenly
distributed over the face of the "forme" without the impression being transferred
on to the platen or sheet. The "forme may by this arrangement be inked as
many times as required.
"
A further part of my invention consists in the provision of a supplemental roller

page_text: mounted in bearings in the framing below the type bed, the said roller being
placed in such a position that the inking rollers after passing the face of the type
shall deposit the surplus ink upon the face of the said supplemental roller. A
second roller of smaller diameter is mounted below the said roller the smaller
roller being driven by suitable means and also having a reciprocal longitudinal
motion imparted thereto by any suitable mechanism, as, for example, a face cam
or eccentric and strap.
By this arrangement the surplus ink upon the inking rollers is transferred on
to the larger roller and is distributed over the face of the latter by the distributing
or smaller roller. The face of the type by this arrangement is re-inked uniformly
upon the return movement of the rollers, the type thus being double inked.
Dated this 17th day of October 1892.
HORN & SON,
Applicant's Agents.
COMPLETE SPECIFICATION.
Improvements in and relating to Inking Mechanism for Platen
Printing Machines.
I, PETER HOOKER of Pear Tree Court Farringdon Road London E.C. Engineer
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 improvements in inking mechanism for job platten
printing machines in which the platten is operated by means of a cam & lever or
similar mechanism & which have a swinging or oscillating type bed. My invention
may however be applied to other types of machine without departing from the
spirit thereof.
My invention has for its object the provision of a means when so desired for
preventing the forme from being inked when the impression is thrown off" or
by means of which the forme may be inked & the machine so run that the ink
upon the "forme
may not be transferred upon the sheet.
وو
My invention also consists in the provision of a novel mechanism whereby the
"forme" may be double inked.
To this end my invention consists in the details & combination of parts herein-
after described.
In order to prevent the "forme" from being inked I provide the bearers with
moveable side irons in or upon which the inking rollers are carried the said side
irons are suspended from a suitable point or pivot upon the framing & when the
machine is in use the inking rollers bear against the face of the type the said inking
rollers being operated in the ordinary & well known manner.
When the impression is thrown off by the lever in the ordinary way the side
irons before referred to are caused to project beyond the face of the bearers
thereby shifting the carriage of the inking rollers & preventing the said ink rollers
bearing against the forme."
A further part of my invention consists in the provision of a supplemental roller
mounted in bearings in the framing below the type bed the said roller being placed
in such a position that the inking roller after passing the face of the type shall
deposit the surplus ink upon the face of said supplemental roller. A second roller
of smaller diameter is mounted below the said roller the smaller roller being driven
by any suitable means & having a reciprocal longitudinal motion imparted thereto
by mechanism hereinafter described. By this arrangement, the surplus ink upon
the inking rollers is transferred on to the upper or larger roller & is distributed
over the face of the latter by the distributing or smaller roller. The face of the
type is by this arrangement inked uniformly by the return movement of the inking
rollers the type being thus double inked.

page_text: of parts for preventing the inking of the forme when the impression is thrown off.
Fig. 2 is a side elevation of the ink distributing mechanism forming the second
part of my invention.
Fig. 3 is an end elevation &
Fig. 4 is a plan of the same.
Like letters indicate corresponding parts throughout the several figures.
Referring first to Fig. 1 A is a portion of the framing of the mch. B is the
forme. C is a side iron of which there are two suspended one upon either side of
said forme & being hung upon a pivot c. The inking rollers are carried in bearings
formed in or upon the said side irons C.
When the machine is in use the inking rollers bear against the face of the type
the said inking rollers which are not shewn in the drawings being operated in the
ordinary and well known manner.
Upon the impression being thrown off the side irons C before mentioned are
caused to project beyond the face of the bearers thereby shifting the position of
the inking rollers & preventing the said rollers bearing against the forme.
The said movement of the side irons C is accomplished by the following
mechanism.
Upon the journal a of the throwing off lever D I provide a disc d having a
segmental slot e formed therein, the said slot having a notch e' in which is engaged
a pin fupon a connecting rod E the other end of which rod E is attached to one
arm g of a bell crank lever G fulcrummed upon the side frame of the machine.
The other arm g¹ of said bell crank lever G has a connecting rod H loosely
attached thereto the end of said rod forming the junction with the bell crank lever
being normally co-axial with the pivot of the movable carriage of the type bed.
The said connecting rod H operates the movable side irons of the bearers through
a second bell crank lever J the several parts being adjusted in such a manner that
the movement of the throwing off lever D (as indicated by the dotted lines) through
the connected parts just described shall cause the side irons to be moved forward
from the face of the forme in the manner before described.
In order that the ink may be transferred to the face of the type from the inking
plate by the rollers when the impression is thrown off I release the pin from the
notch & allow it to traverse the length of the slot e thus causing the mechanism
previously described to resume their inking position which is occupied by the
several parts when the machine is in operation thereby allowing the ink to be
evenly distributed over the face of the type without the impression being transferred
on to the platten or sheet. The forme may by this arrangement be inked as many
times as required.
The other part of my invention relating to the ink distributing mechanism which
is illustrated in Figs. 2 3 & 4 consists of a supplemental roller K mounted in
bearings k in the framing A below the type bed the said roller K being placed in
such a position that the inking rollers after passing the face of the type shall
deposit the surplus ink on the face of the said roller K.
A second roller of smaller diameter is mounted below the said roller K the
small roller being driven by frictional contact or other means & also having a
reciprocal longitudinal or rubbing motion imparted thereto by the following
mechanism.
P is a bell crank lever fulcrummed upon a bracket p of the framing one arm of
the said bell crank being connected by a rod to the leg R of the oscillating type
bed. The other arm of said lever P is connected to the bearing of the roller by
by means of a depending pin s upon said bearing which engages a slot formed in
the arm of the lever P. Thus the oscillatory motion of the leg R will impart a
lateral motion in both directions to the smaller roller l.
By this arrangement the surplus ink upon the inking rollers is transferred on to

page_text: the roller K & is distributed over the face of the said roller by the rubbing motion
of the roller l. The face of the type by this arrangement is re-inked uniformly
upon the return movement of the inking rollers the type thus being double inked.
Although I have described a bell crank for imparting a longitudinal motion to
the roller other means may be employed for the purpose as for example a face
cam without departing from the spirit of my invention.
Having now particularly described & ascertained the nature of my said inven-
tion & in what manner the same is to be performed I declare that what I
claim is
1. In a platten printing machine the combination of side irons adapted to be
moved by the operation of the throwing off lever with the mechanism for connecting
the said parts consisting of the bell crank levers & connecting rods the whole being
arranged substantially as described & illustrated in Fig. 1 of the accompanying
drawings.
2. In a printing machine the combination of a roller adapted to receive the
surplus ink from the inking rollers, a roller bearing against the said roller & having
a rotary & longitudinal motion & the mechanism for imparting the said motions the
whole being arranged substantially as described & illustrated in Figs. 2, 3 & 4 of
the accompanying drawings.
Dated this 17th day of July 1893
PETER HOOKER,
Applicant.