Improvements in Feeding Devices for Printing Presses.
Year: 1899

page_text: Date of Application, 23rd May, 1899-Accepted, 15th July, 1899
COMPLETE SPECIFICATION.
Improvements in Feeding Devices for Printing Presses.
I, EUGENE SEMPLE BRADFORD, a citizen of the United States, residing on 77th
Street, near Fifth Avenue, in the City of Brooklyn, in the County of Kings, and
State of New York, Mechanical 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 has relation to printing presses and particularly in such connec-
tion does it relate to feeding devices for such presses.
The principal object of my invention is to provide a simple, effective and
reliable feeding device for a printing press and more particularly of the rotary
plate printing type, adapted to be reciprocated to and from impression and plate
cylinders of the press so as to bring the paper or other matter to be printed upon
into the bite of the said cylinder, to cause the work to register accurately with
the plate of one of said cylinders and providing the same with suitable means
for actuating said feeding device.
My invention stated in general terms consists of a feeding device for a printing
press substantially as hereinafter described and claimed.
The nature and characteristic features of my invention will be more fully under-
stood from the following description taken in connection with the accompanying
drawings forming part hereof, in which
Figure 1, is a side elevation of a portion of a printing press embodying main
features of my present invention.
Fig. 2, is a longitudinal central section of Fig. 1, showing the feeding device
of my said invention in its actuated position.
Fig. 3, is a top or plan view partly sectioned of Fig. 1; and
Fig. 4, is a rear elevational view of the said feeding device of the press.
Referring to the drawings, in the machine of my said invention A, is the
impression cylinder and B, a plate cylinder, both suitably journaled in bearings
in the frame-work C, of the machine. The bearings 6, of the impression cylinder
are preferably supported in vertical guides 6', and a spring s, and a set-screw s¹,
are provided whereby the position and pressure of the impression cylinder are
readily and efficiently adjusted. D, is the feed-board which reciprocates on
guides e, toward and away from the impression and plate cylinders A and B,
so that the paper sheet, being placed on this board, is fed into the bite of the
cylinders, which carry it through and deliver it at the other side of the same,
thereby dispensing with grippers or other similar appliances for holding the
paper or card-board in proper position and ensuring more exact registration.
To effect such reciprocation of the feed-board a rock-shaft f, is employed, which
is connected by an arm f, and link f2, to the feed-board and by an arm f³,
and link or bar f*, to a bent lever g, pivotally secured at g¹, to the frame-work C.
This lever is provided with a roll g², engaging in a cam groove g³, of a disc g¹.
This disc is adjustably carried preferably by a movable part of the machine,
for example, by the gear-wheel G, as illustrated in Figs. 2, 3 and 4, of the

page_text: drawings. The gear-wheel G, is secured to the main shaft H, of the plate
cylinder B, and is driven by any suitable mechanism, not shown. By the rota-
tion of said disc g*, the bent lever g, is moved up and down by means of the
roll g², caused to travel in the cam groove 93, and imparting reciprocating
motion to the rock-shaft f, which in turn causes a back and forth movement
of the feed-board towards and from the respective cylinders A and B, of the
press. The front portion of the feed-board D, is pointed in order to enable the
same to be brought in close proximity to the point of contact of the impression
cylinder A, with the plate cylinder B, so that the paper or other matter to be
printed upon placed on the feed-board and projecting preferably a short dis-
tance therefrom may be brought accurately into the bite of the respective
cylinders, thereby ensuring perfect impressions through the pressure of the
cylinders upon the matter to be printed upon and likewise ensuring a uniform
feed of the paper or other matter to between and from said cylinders.
Having now particularly described and ascertained the nature and object of
my invention and in what manner the same is to be performed, I declare that
what I claim is:-
1. In a machine of the character described, impression and plate cylinders,
a feed-board provided with a reduced or pointed front adapted to be moved on
guides to and from said impression and plate cylinders so that the paper or
other matter to be printed upon placed on said board may be brought accurately
into the bite of said cylinders and also register accurately with a plate carried
by one of said cylinders, a rock-shaft connected by an arm and link with said
board, an arm and link or bar connected with a pivoted bent lever provided
with a roll engaging in a cam groove of an adjustable disc carried by a gear
wheel and means for actuating said wheel, substantially as and for the purposes
described.
2. In a machine of the character described, impression and plate cylinders, a
feed-board reciprocated on guides to and from said impression and plate cylinders
to cause the matter to be printed upon to be securely delivered into the bite of
said cylinders and thereby to register accurately with the plate carried by one
of said cylinders, a rock-shaft connected by an arm and link with said board and
a link or bar connected with a bent lever provided with a roll, said roll engaging
a cam groove of a rotary disc, substantially as and for the purposes described.
Dated at Philadelphia Penna this 23rd day of March T 1800
EUGENE SEMPLE BRADFORD,
Per. J. G. Lorrain, M.I.E.E., M.I.Mech. E.,
Norfolk House, Norfolk Street, London, W.C., Chartered Patent Agent.