Improvements in or relating to Means for Drying Printed or Varnished Metal Plates or similar Articles.
Year: 1898

page_text: Date of Application, 19th Mar., 1898
Complete Specification Left, 15th Dec., 1898-Accepted, 11th Mar., 1899
PROVISIONAL SPECIFICATION.
Improvements in or relating to Means for Drying Printed or
Varnished Metal Plates or similar Articles.
I, RICHARD LEIMANN, Manufacturer, of Zwickauerstrasse, 43, Dresden, in the
Empire of Germany, do hereby declare the nature of this invention to be as
follows:-
The drying of sheet metal printed or varnished plates or similar articles has
hitherto been effected in ovens or heated chambers in such manner that the articles
were placed in horizontal, oblique or vertical positions in frames which were intro-
duced into the oven one by one by means of angle pieces secured to the sides of the
oven, or several at once on a suitable truck.
These ovens or chambers and generally this process of drying present the follow-
ing amongst other disadvantages,
1) It is extremely difficult to make ovens or drying chambers having a suffi-
ciently uniform temperature in all its parts, consequently the articles introduced
do not dry in a uniform manner and come out very unequal in quality.
2) Without removing the articles introduced last which naturally are the last
to dry it is impossible to remove the articles introduced first and placed at the
back of the oven or chamber and already dried.
3) Owing to the ovens being of such construction as to necessitate filling and
emptying them with batches of goods to be dried, while the machines for supplying
them with work, such as quick printing presses or varnishing machines, etc., turn
out work in a continuous manner it is impossible to avoid an accumulation of
printed or varnished articles outside the oven, before introducing them as they
have to wait until the articles already in the oven have been
dried and the chambers again emptied. This accumulation not only requires a
great amount of space and a double number of appliances (as frames etc.) but
also exposes the articles to be dried to damage by dust and the like.
4) Finally the fact of the method necessitating a large free space in front of
the oven or chamber for filling and emptying purposes, not only necessitated large
spaces for such works, but also made the ways for the articles longer, thus increas-
ing the expenditure for wages and wear out of apparatus etc.
All these drawbacks are avoided by the drying means according to the present
invention.
as by
The chamber is preferably constituted by one or more adjacent stonework-or
other passages heated preferably from underneath in any suitable manner
hot air steam or hot water, and in each of which works a pair of endless chains
or bands or an endless transport device which chains or bands, are guided outside
the passages on rollers or pulleys and caused to move in a uniform direction from
the discharge side.
·
These chains may consist of separate links which are provided with slightly
oblique pins or supports in the intervals between which are placed the articles to
be dried.

page_text: The heating chamber according to the present invention enables the quick print-
ing presses or varnishing machines to be arranged in close proximity to its entrance
so that the articles are placed from the machine directly between the supports of
the slowly moving transport bands and delivered on the other side in a completely
dry state. The transport device may move through the heating chamber at any
required speed, its speed being adjusted to suit requirements or the speed of the
production of the printing press or varnishing machine and to avoid accumulation
of articles ready for drying and their injury by dust e'c.
The use of chain-links provided with pins or supports does away with the neces-
sity of drying frames or trucks, and as these chains always remain in place there
is no necessity to have any other transport means and consequent wear and tear
is avoided.
The form of transport device and its pins or supports may be varied according to
requirements as any suitable driving device or means may be employed therefor.
Dated this 19th day of March 1898.
BOULT & WADE,
Agents for the Applicant.
Improvements in or relating to Means for Drying Printed or
Varnished Metal Plates or similar Articles.
I, RICHARD LEHMANN, Manufacturer, of Zwickauerstrasse 43, Dresden, in the
Empire of Germany, 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: --
The drying of sheet metal printed or varnished plates or similar articles has
hitherto been effected in ovens or heated chambers in such manner that the articles
were placed in horizontal, oblique or vertical positions in frames which were intro-
duced into the oven one by one by means of angle pieces secured to the sides of the
oven, or several at once on a suitable truck.
These ovens or chambers and generally this process of drying present the follow-
ing amongst other disadvantages
(1) It is extremely difficult to make ovens or drying chambers having a suffi-
ciently uniform temperature in all its parts, consequently the articles introduced
do not dry in a unifeim manner and come out very unequal in quality.
(2) Without removing the articles introduced last which naturally are the last
to dry, it is impossible to remove the articles introduced first, and placed at the
back part of the oven or chamber and already dried.
(3) Owing to the ovens being of such construction as to necessitate filling and
emptying them with batches of goods to be dried, while the machines for supplying
them, such as quick printing presses or varnishing machines etc., turn
out work in a continuous manner, it is impossible to avoid an accumulation of
printed or varnished articles outside the oven, before introducing them as they
have to wait until the articles already in the oven have been
dried and the chambers again emptied. This accumulation not only requires a
great amount of space and a double number of appliances (as frames etc.) but
also exposes the articles to be dried to damage by dust and the like.
(4) Finally the fact of the method necessitating a large free space in front of
the oven or chamber for filling and emptying purposes, not only necessitated large
spaces for such works, but also made the ways for the articles longer, thus increas-
ing the expenditure for wages and wear of apparatus dr.

page_text: Fig. 5 a plan and
Fig. 6 a detail.
A is the furnace of any construction and with any source of heat, for heating
the chamber A' in which the chain carrier operates. Pipes B are used in this case
as an example, the heating being supposed to be by water. CC are so called
"under"-flues through which hot gases pass before entering the flue leading into
the chimney. The chain-carrier K consists of a series of links carrying substan-
tially vertical pins Z and between which are placed the articles to be dried said
chain carrier being adapted to be rotated on rollers D D.
Instead of the chain passing in a straight line between the two rollers the empty
or lower chains may rise upwards after leaving the rollers, so that they travel
along the length of the oven at a higher point than corresponds to the diameter of
the chain rollers. In this way a saving is effected in the inner height of the oven
and in the space to be heated, whereby a considerable economy of heat and con-
sequently of fuel, is effected, apart from the advantage that the source of heat and
the whole heating device lies higher and less foundation is required. This consti-
tutes a constructive advantage as the cross girders serve simultaneously for securing
the upper and lower chain guides.
The construction of the chains is improved by making series of the pins Z,
between which the sheet metal plates are placed, in one piece with the chain link K,
whereby not only a saving in height is effected but the use of screws and other parts
which easily become loose or detached during working is avoided.
Further those chain links which carry no pins are made as double links and are
provided with beadings bb with which they slide on the chain guides, the beading b
sliding on the guides of the upper chains when the teeth Z point upwards, and the
beading on the guides of the lower chains when the teeth point downwards. Or
the links may be provided with rollers (Fig. 4) arranged outside with which
they roll on the respective guides, the travelling being thus rendered more easy
and the quantity of power required for the movement reduced.
The heating chamber according to the present invention enables the quick print-
ing presses or varnishing machines to be arranged in close proximity to its entrance
so that the articles are placed from the machine directly between the supports of
the slowly moving transport band and delivered on the other side in a completely
dry state. The transport device may move through the heating chamber at any
required speed, its speed being adjusted to suit requirements, or the speed of the
production of the printing press or varnishing machine and to avoid accumulation
if articles ready for drying and their injury by dust etc.
The use of chain-links provided with pins or supports does away with the neces
sity of drying frames or trucks, and as these chains always remain in place, there
is no necessity to have any other transport means and consequent wear and tear

page_text: is avoided. The form of the transport device and its pins or supports may be
varied according to requirements and any suitable driving device or means may
te employed therefor.
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:
1. Means for drying metal or other printed or varnished plates or similar
articles, comprising a drying chamber and an endless carrier-chain or chains band
or the like by means of which the articles to be dried may be successively and
continuously introduced into and delivered from the drying chamber substantially
as described.
2. In drying chambers of the character described the use of transport bands or
chains provided with projecting teeth pins or supports between which the articles
to be dried are placed substantially as described.
3. The combination and arrangement of parts constituting the complete drying
apparatus for metal or other printed or varnished plates or similar articles sub-
stantially as described or illustrated in the accompanying drawings.
Dated the 15th day of Doomhor 1808
Dated the 15th day of Doomhor 1908
BOULT & WADE,
Agents for the Applicant.