Improvements in "Platen" Printing Presses.
Year: 1896

page_text: PROVISIONAL SPECIFICATION.
Improvements in "Platen" Printing Presses.
We, FRED WAITE, of 32, Mount Pisgah, Otley, in the County of York,
Printer's Engineer, and WAITE & SAVILLE, LIMITED, of Falcon Works, Otley,
aforesaid, Engineers, do hereby declare the nature of this invention to be as
follows:-
This invention relates to improvements in "platen" printing presses, and its
primary object is to enable one sheet to be fed whilst the other receives the
impression.
To carry out our invention we employ an inverted "forme" with the platen
beneath and a feed device on both sides which alternately pass a sheet of paper or
its equivalent into the press. The inking rollers are preferably mounted between
the two feed devices and move with them so that the type or forme is inked as each
sheet passes into the press.
The forme or "chase" may be arranged to slide into guides or slide pieces to
secure it to the inverted bed of the press which bed is preferably rigidly fixed to
the framework; and the platen is mounted on a vertical slide or slides and is lifted
to give the impression, by means of two eccentric or oval wheels geared together
and respectively mounted on the framework and on the platen slide, or by other
suitable mechanism.
The paper may be fed to the platen by a "tympan" on each side which may be
mounted upon a rocking frame or carriage arranged and operated so as to bring
them alternately into the press. The tympans are capable of an independent
vertical movement and are lifted by the platen when the sheet of paper receives
the impression. Suitable fingers or grippers may be provided to retain the paper
in position on the tympans. The type inking rollers are preferably mounted in the
rocking frame between the two tympans and a revolving ink feed cylinder is
preferably provided at both sides of the press. The two ink cylinders are preferably
fed from the same ink "duct."
In addition to the increased production obtained by employing a double feed to
one set of type only one "making ready" is necessary.
Other suitable feed devices may be employed instead of the above as for
instance: Two platens may be mounted on the said rocking frame or carriage and
the said platens, frame or carriage may be lifted to give the impression.
To prevent
an impression being made when not required as for instance when
there is no paper on the tympan or when the machine is being fed from one side
only we may employ an eccentric or equivalent device located between the platen
and the platen slide and which is adapted to be operated by a lever or the like
engaging a movable pin or pins or its or their equivalent and thereby sufficiently
lower the platen in relation to its slide. When the machine is fed from one side
only the pin may be brought automatically across the path of said lever every
alternate stroke.
The face of the platen may be made detachable to facilitate making ready.
Dated shi. Wh 2
CA
1000
DRACUP & NOWELL,
Bradford, Patent Agents.

page_text: Improvements in "Platen" Printing Presses.
We, FRED WAITE, of 32, Mount Pisgah, Otley, in the County of York,
Printer's Engineer, and WAITE & SAVILLE, LIMITED, of Falcon Works, Otley,
aforesaid, Engineers, 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 improvements in "platen" printing presses, and it
primarily consists of an inverted form or type bed in conjunction with a
double feed.
Figure 1, in the accompanying sheets of drawings represents a side elevation of
our improved machine.
Figure 2, represents a plan view of the same.
Figure 3, represents an elevation of the opposite side to Figure 1, and Figure 4,
represents an end view of the same.
Figure 5, represents a separate view of the platen.
The side frames A and A 2 are connected together in any couvenient manner and
have bearings A3, A3 formed in them for the driving shaft A 4 fitted with fast
and loose pulleys A 5 and A 6 and a fly wheel A. 7 omitted in Figure 1. The
pulleys A 5 and A 6 are not shown in Figure 3 and the shaft A 4 is shown broken
away. The shaft A 4 is fitted with a spur wheel A 8 engaging the wheel B rigidly
secured upon the stout shaft B 2 this stout shaft is mounted in bearings B3, B3
formed in the side frames A and A 2 and carries an eccentric toothed wheel B4
rigidly fixed to it. This eccentric wheel has a cylindrical piece on each side the
same diameter as the pitch line of the teeth and the teeth engage a similarly
formed wheel C of the same diameter mounted eccentrically on the shaft C2 fitted
in bearings C 3, C3 formed in the vertically sliding frame C4. The frame C4
has cylindrical ends C5 which slide in guides C6, C6 formed in the cross
stays A 9, A. 9 of the framework and is made with a projecting arin C7 which
carries a vertical stud C8 engaging the vertical guide C 9 formed in the upper
cross stay A 9. It will be seen that at each revolution of the eccentric wheels
the frame C 4 will be raised and lowered and that the stud C8 will prevent the
frame from twisting as it is raised and lowered. The platen D is fixed on the top
of the upper cylindrical end C 5 of the frame C4 and a removable plate D 2 held
in position on the top of the platen by dowels or pins D 3 is provided to facilitate
"making ready."
The chase E containing the form to be printed from is placed face downwards
hetween the dovetail side guides E 2, E2 formed upon the inverted type bed E 3
rigidly secured to the side frames by the four bolts E 4.
The material to be printed is fed sheet by sheet between the plate D2 and the
chase E from both sides of the machine alternately by means of two tympans F
and F 2 fixed in suitable frames F3 mounted in the sliding carriage F4 fitted in
the guides F 5, formed on the inside of the side frames A and A 2. The carriage F4
is reciprocated by the cam G so as to bring the tympans alternately under the
form whilst the platen is down and leave them stationary there whilst it (the platen)
has risen and made an impression. The cam G is fixed upon the shaft G 2 driven
by the toothed wheel G 3 fixed upon it engaging the toothed wheel G 4 upon the
shaft B 2. A cam race G5 is formed in the face of the cam G into which the
anti-friction roller G 6 carried by the arm G 7 projects and this arm is rigidly
fixed upon and operates the rocking shaft G 8. Two arms F6, F6 are rigidly
fixed upon the shaft G 8 and are connected to the carriage F 4 by means of the

page_text: links F 7, F 7. The cam G is driven at half the speed of the shaft B 2 and there
are two "dwells" in it so that the carriage is held at each end of its stroke long
enough for the impression to be made on the sheet carried by the one tympan and
for a new sheet to be fed onto the other. The tympan frames F 3 are fitted upon
the guide ridges F8 on the carriage in such a manner that they are confined
horizontally in relation to the carriage but are free to be lifted by the platen so as
to bring the sheets carried by them in contact with the form.
To hold the sheets stationary on the tympans whilst the carriage is moved the
fingers H, H are provided for each of the tympans. The fingers for each tympan
are adjustably fixed to a shaft H 2 mounted in lugs H 3 on the tympan frames and
an arm H 4 on the end of the shaft H 2 connected to the spiral spring H 5 keeps
the fingers down excepting when raised at the end of each stroke (as clearly shown
in Figures 1 and 3) by the inclines H 6, H 6 engages the studs H7 fixed in the
arms H 8 secured on the opposite ends of the shaft H 2 to the arms H 4. To lower
the fingers H, H before the carriage starts the inclines H 6, H 6 are first moved
away from the studs H 7. For this purpose the inclines are connected together by
the bar H 9 and are capable of sliding upon the top of the frame A 2 within the
limits allowed by the slots N formed in each end of A. 9, and the screws N 2 fixed
in the top of the side frame. The inclines H 6, H 6 and bar H 9 are moved by the
arm N 3 coupled to them by the link N 4. The arm N 3 is fixed on the end of the
shaft N 5 which shaft is rocked by its arm N 6 carrying an anti-friction roller N 7
which engages the cam N 8 on the shaft G 2. The spring. N 9 keeps the roller N 7
against its cam.
To enable the attendants feeding the sheets to the tympans to prevent an
impression being made on either of the tympans without interfering with the other
as for instance when a sheet is missed the platen D is connected to the upper
end C5 of the frame C 4 by means of the pillar D4 rigidly fixed to the underside
of the platen and fitting the socket D5 formed in the top of the frame. The
bottom of the pillar D4 rests upon the top of the cam J formed upon the shaft J 2
mounted in bearings formed in the frame C4 and a lever J 3 on the end of the
shaft coupled to the spring J 4 tends to keep the cam in this position and hold the
platen at its full height in relation to the frame C 4. To lower the platen
sufficiently to prevent an impression being made the slide K is provided mounted
in guides K 2 in the frame A 2 and is reciprocated by means of the lever K3
mounted upon the stud K 4 fixed in the side frame A 2. The lever K3 has an
eye K5 at its upper end which engages a stud K 6 in the slide K and reciprocates
it during each revolution of the cam K 7 upon the shaft C2. The cam K7 engages
the anti-friction roller K 8 on the lower end of the lever K3 and reciprocates the
slide K in one direction whilst the spring K 9 effects the return stroke and keeps
the roller K8 against the cam. Movable bars L and L2 are fitted upon the
slide K and the stud 5 on the lever .J 3 normally clears these bars as it rises and
falls with the platen. But when either of the bars are pushed inwards as far as the
slots L 3, by which they are mounted upon the studs L4 fixed to the slide K, will
permit the inner end of the bar thus pushed lies in the path of the stud J 5 and
when the latter reaches it the shaft J 2 is turned sufficiently to turn the cam J aud
by lowering the platen in relation to the frame prevent the impression being made.
The levers L 6 and L7 mounted upon the slide K and respectively connected to
the bars L and L 2 are provided to move the bars. The lever L6 and bar L in
Figure 3 are shown in the position they occupy when the bar L is pushed inwards
and its inner end lies across the path of the stud J 5.
To ensure the tympan frame descending with the platen after receiving the
impression the tympan frames F3 have studs a secured to them which pass through
the carriage F4 and spiral spring a2 are placed upon a and are compressed against
the underside of the carriage by means of the nuts a 3.
To bring the carriage firmly to rest each time an impression is made grooves V
are formed in opposite sides of the platen which engage projections V2 on the
carriage each time the platen is raised.

page_text: The form is inked by two inking rollers O, O mounted on the carriage F4
between the tympans. The rollers O, O are alternately supplied with ink from the
distributing cylinders P, P mounted on each side of the inverted bed E 3.
cylinders P, P are fed from one ink duct roller R by the ducter rollers S, S.
The latter rollers are mounted upon arms S2, S2 and S3, S3 fixed on the rocking
shaft S4 passing through E3. The shaft S 4 is rocked by its arm S 5 in such a
manner that the roller's S, S are alternately carried from the ink duct roller to the
distributing cylinders and vice versa. The arm S5 is vibrated by the rod S6
coupling it to the arm S7 on the shaft S 8 mounted in bearings formed in the side
frame A 2. An arın S9 on the inner end of the shaft S8 engages the cam T on
the shaft G 2 which vibrates it.
The ink duct roller R is rotated by the ratchet wheel R 2 fixed to its shaft R 3.
The operating pawl R4 engaging the ratchet R 2 is mounted upon the lever R 5
loosely fitting the shaft R 3. The lever R5 is rocked upon the shaft R3 by the
rod R6 connecting it to the pin R7 eccentrically fixed to the disc R8 secured
upon the end of the shaft B2.
The cylinders P, P are driven by the chain 04 from the chain wheel 05 upon
the shaft A 4.
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 :
1. A platen printing, machine having an inverted type bed and two feed devices
constructed and arranged to alternately feed the material to be printed, substantially
as herein shown and described.
2. A platen printing press having a platen operated by two toothed eccentric
wheels or cams, substantially as herein shown and described and illustrated.
3. A platen printing press having an inverted type bed and a platen provided
with a removable making ready plate, substantially as herein shown and described.
4. A platen printing press having an inverted type bed, and a reciprocating
carriage fitted with two tympans, substantially as herein shown and described.
5. A platen printing press having an inverted type bed, and a carriage fitted
with two tympans having a device for inking the type or form between them,
substantially as herein shown and described.
6. In a platen printing press fed by two tympans, the arrangement for preventing
an impression being made on either tympan, substantially as herein shown and
described and for the purpose specified.
7. In a platen printing press having an inverted type bed, the combination with
one duct roller R and ductor rollers S, S of two distributing cylinders P, P
substantially as herein shown and described.
8. The combination with the carriage F4, of the tympans F 2, F2 and the
spring fingers H, substantially as herein shown and described.
Dated this 13th day of January 1897.
DRACUP & NOWELL,
Bradford, Patent Agents.