Improvements in Printing Machines.
Year: 1895

page_text: Improvements in Printing Machines.
I, EDOUARD LAMBERT, of No. 16 Rue Drouot, Paris, France, do hereby
declare the nature of this invention to be as follows:-
This invention relates to a construction of perfecting printing machine having a
single cylinder and a reciprocating table carrying two formes, the table being
provided with pistons working in air cylinders so as to deaden the shock when it
reaches the extremities of its stroke, this air buffer arrangement being applicable
to reciprocating printing tables generally.
The table, according to the present invention, is moved to and fro by what is
usually known as the hypocycloidal motion in which a toothed wheel revolves
within an internally toothed wheel of double the diameter, a crank pin on the
smaller wheel being thus caused to move to and fro in a straight line. These
wheels being arranged horizontally and the crank pin being connected to the table,
the required reciprocation of the table is effected. To each side of the table is
fixed a rod carrying at both its ends a piston working in an air cylinder, which it
fits closely only as it approaches the end of its stroke compressing the air in the
cylinder which acts as a buffer. Each of the two formes is on a bed resting on two
inclined bars which, besides moving to and fro with the table, have additional
to and fro movements imparted to them by cams in such a manner that during each
stroke of the table one of the formes raised while the other is lowered, and thus
the cylinder which is caused to revolve in stationary bearings by gearing with the
table effects impression on each forme alternately.
The formes are inked in the usual way, the inking rollers ascending and
descending with the formes. The cylinder is provided with double grippers and
on each side of it there are tapes, the gripper and tape mechanism being worked
by suitable cams and so arranged that a sheet taken by the grippers from the feed
table is first carried round with the cylinder and printed on the one side; its rear
end is then directed by the tapes in such a manner as to reverse the sheet while
the grippers holding its front edge turn over in the gap of the cylinder, and then
as the cylinder turns in the opposite direction it carries the sheet round printing
its other side, after which the tapes carry it on to the delivery table. In order
that the tapes may suitably guide the sheet in its successive movements, some of
the rollers around which they pass are made to oscillate, and elastic tapes are
employed to allow for their oscillations.
Dated this 20th day of July 1895.
ABEL & IMKAY,
Agents for the Applicant.

page_text: I, EDOUARD LAMBERT, of No. 16 Rue Drouot, Paris, France, 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 a construction of perfecting printing machine having a
single cylinder-and-a-reciprocating table carrying two formes, the table being
provided with pistons working in air cylinders so as to deaden the shock when it
reaches the extremities of its stroke, this air buffer arrangement being applicable
to reciprocating printing tables generally.
The table according to the present invention is moved to and fro by what is
usually known as the hypocycloidal motion in which a toothed wheel revolves
within an internally toothed wheel of double the diameter, a crank-pin on the
smaller wheel being thus caused to move to and fro in a straight line. These
wheels being arranged horizontally and the crank pin being connected to the table,
the required reciprocation of the table is effected. To each side of the table is
fixed a rod carrying at both its ends a piston working in an air cylinder, which it
fits closely only as it approaches the end of its stroke compressing the air in the
cylinder which acts as a buffer. Each of the two formes is on a bed resting on two
inclined bars which, besides moving to and fro with the table, have additional
to and fro movements imparted to them by cams in such a manner that during
each stroke of the table one of the formes is raised while the other is lowered, and
thus the cylinder which is caused to revolve in stationary bearings, by gearing
with the table, effects impression on each forme alternately. The formes are
inked in the usual way, the inking rollers ascending and descending with the
formes.
The cylinder is provided with double grippers, and on each side of it there
are tapes, the gripper and tape mechanism being worked by suitable cams and so
arranged that a sheet taken by the grippers from the feed table is first carried
round with the cylinder and printed on the one side; its rear end is then directed
by the tapes in such a manner as to reverse the sheet while the grippers holding
its front edge turn over in the gap of the cylinder, and then as the cylinder turns
in the opposite direction it carries the sheet round printing its other side, after
which the tapes carry it on to the delivery table. In order that the tapes inay
suitably guide the sheet in its successive movements, some of the rollers around
which they pass are made to oscillate, and elastic tapes are employed to allow for
their oscillations.
Fig. 1 of the accompanying drawings is a longitudinal section, Fig. II is a part
plan, and Fig. III is a transverse section of a printing machine according to my
invention.
Fig. IV is a transverse section to an enlarged scale of part of the cylinder and
its adjuncts and
Fig. V is a sectional plan of the grippers and spindle.
The machine has two side frames A A' tied together by cross frames B carrying
the rails C C¹ for the rollers E E' of the carriage F, and the buffer cylinders D Di
which are closed at the ends but communicate by small pipes d d¹. The carriage F
has grooves L L'in which can slide two pairs of inclined bars G G and H H',
the one forme table M-carrying the forme N,-resting on the pair G G¹ and the
other forme table M' carrying the forme Ni resting on the pair H H. Both
tables are linked to the carriage F, each by a pair of rods a a¹ and 6 6', so that
while either table can be raised or lowered by the longitudinal movement of its
inclined supporting bars, its position relatively to the carriage F is unaltered. By