Improvements in Machines for Applying a Coating of Gum or other Mucilaginous Substance to Paper and the like, and for Cutting the Paper at the Same Time.
Year: 1890

page_text: Date of Application, 4th Mar., 1890-Accepted, 5th Apr., 1890
COMPLETE SPECIFICATION.
Improvements in Machines for Applying a Coating of Gum or other
Mucilaginous Substance to Paper and the like, and for Cutting
the Paper at the Same Time.
CHARLES HUDSON and JOSEPH SPOOR HUDSON, 3 Langdale Terrace, Stockton on
Tees, Cardboard Box Makers, 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 :-
Our invention relates to a machine to be used for spreading a coating of gum,
paste, glue, or other mucilaginous substance, to the underneath side of paper, card-
board, and the like, and to the delivery and transit of the said coated article to some
place where it is required for use or placement, and also for cutting the said paper
when such cutting is necessary, as in the case of wall papers, or for narrow strips for
cardboard box makers.
Our machine is composed of two rollers, fixed in horizontal positions, and working
in suitable bearings fixed at each end of the tank, containing the mucilaginous
substance for coating with. The lower roller acts as a feed roller, in taking up on
its surface the coating substance, and applying it to the surface of the upper one,
over which the article passes to be coated.
Over the full length of the upper roller, and in approximate shape to it, we have a
tension plate which partially covers the same.
In and around the upper or pasting roller, we cut grooves at intervals, these
grooves are cut an appropriate depth and width for the thickness and breadth of
the endless bands we place in them. The said bands take up from the lower roller
a portion of paste in proportion to the surface or uncut portion of the upper
roller, thus producing no break or mark in the coating of the article when
finished.
To regulate the thickness of the coating applied to the paper, we provide a
strickle or scraper of metal or other suitable substance, or a small roller in suitable
bearings may be used if desired, such scraper is regulated by angular slots on each
side of the paste tank, and kept in proper position by thumb screws or any other
suitable means..
We prefer to feed the paste tank from an air tight vessel, so as to keep an abundant
but not over supply of mucilage to the paste roller, or it may be fed by any other
means desired. This tank may be of any reasonable size or shape, but the shape
preferred is the one we shew in the drawings annexed.
On the top of the said tank in front of the pasting roller and in close proximity
to it, we have two feed rollers, which take in between them the paper as it passes to
the pasting roller. The topmost of these feed rollers is a self adjusting one, so that
it will feed in flat any thickness of paper required to be coated.
The coating
roller is arranged to travel at a faster surface rate than the feed rollers, thus
producing a more even spread of paste on the under surface of the paper.
Some short distance from but past the coating roller, we have another roller, in
which we also cut grooves to correspond with those cut in the coating roller, and
in which grooves around both rollers, the endless bands already referred to work,
thus taking off the paper from the coating roller as it passes over it. Around this
roller in the intervals between the said grooves we work another series of endless
bands, which have their reverse part around a roller fixed at a suitable distance beyond
where the article coated is required.
Or we can if desired do without the intervening roller, and continue the bands that
pass round the coating roller to the far roller, but we prefer to use the intervening
roller, as it enables us to use a different kind of endless bands for the first, or take off,
series than we use for the travelling series.

page_text: Many kinds of paper when being moistened on the underneath side will curl up
at the edges towards the uppermost. This we prevent by an arrangement to
turn the paper the moistened side upwards immediately it passes over the
coating roller, thus the weight of the article coated prevents the edges turning
inwards.
To accomplish this object, we bring the roller next past the pasting roller a
little lower, and around it we have a short series of endless bands working around
another roller, somewhat underneath it, which preferably is a pin roller, or with
rigid protrusions and toothed edges, or grooved with very fine edged surfaces, so that
the paper does not adhere to it, but is delivered by it on to the discs placed at
suitable intervals on the turning roller, which roller we also use for working the
carrying bands, one part of the bands working around it.
We fix this, roller slightly below the level of bottom of the pasting tank, so as to
allow space for the paper to go clear under the said tank, on the carrying bands, to
where it is required for use.
Around the said turning roller, in addition to the said carrying bands which work
horizontally, we have placed another series of endless bands working almost vertically,
and at the reverse part around a roller fixed in front, but slightly higher than the
coating roller, thus forming an interstice through which the paper passes on to the
edges. of the discs on the turning roller, which discs as they travel round, turn the front
edge of the paper the pasted side uppermost, on to the carrying bands which carry it
away in this position.
The same result can be accomplished by having the bearings of the coating roller,
instead of vertical to the bearings of the feed roller, to have them at an angle of
about 45° forward, and having endless bands around the said coating roller
and the pin roller, thus dispensing with one roller and one set of endless bands,
but we prefer the pasting roller working vertically to the feed roller as described.
When cardboard or other rigid substance is wanted to be operated upon, we
place in the slots shewn over the bearings of the coating roller, a self adjusting roller,
to act as a pressure to the cardboard instead of the pressure plate, and to prevent the
paste adhering to the said pressure roller we have slight protrusions round both
ends, they being only sufficient to keep the body of roller from being coated,
but not sufficient to prevent pressure upon the cardboard as it passes through the
machine.
The cutting apparatus is composed of a number of circular knives, properly
mounted on two square or other suitable shaped bars, rounded at the bearings. These
bearings are constructed to be fixed securely on to each side of the paste tank
immediately before the feed rollers. The knives are made to move along and fasten
securely and firmly to any position along the bars, and coming in close unison with
each other cut similar to a pair of scissors as the paper passes through them, but we
make no claim to the specific number, character, or style of the cutting knives or
their mountings. The construction and fixing of the knives may vary much, according
to the nature of the work required.
Figure 1. is an end elevation.
"
2 is a plan.
3 is a sectional elevation on line Z Z.
"
"
4 is an elevation of cutting arrangement.
Figures 1, 2 and 3 are shewn without the cutting apparatus attached.
On Figure 3 the dotted endless bands L¹ and roller L represent the machine as
used, when the paper does not require to be turned over.
A is the frame of the machine, B is the tank for holding mucilage. C is the
mucilage roller working in bearings C¹. D is the mucilage feed roller geared from
roller C by D¹. E is the lid of the machine. F is the strickle or scraper to regulate
the supply of mucilage on to the roller. G is the tension cover made at the under-
side in approximate shape to the roller C. H and H' are feed rollers, H being fixed
and suitably geared from roller C. H¹ is self adjustable and working in slots H².
K is a roller with bearings in framework A. K₁ are endless bands working round K

page_text: and C. L is a roller fixed beyond the place where the paper is required to be
used. when it is not required to be turned over. L' are carrying strings working
round L and K. M is a roller working in bearings in the framework A. M' are
endless bands working round M and K. N is a roller working in bearings in
framework A. N₁ are endless bands working round N and R. P is a roller fixed
beyond the place where the paper is required to be used or placed. P¹ are endless
bands working under the machine round rollers P and R. R a roller working in
bearings in framework A, suitably geared to work it as shewn by the arrow.
circular discs round roller R to turn the paper coated side uppermost on to the
carrying bands P¹. S are slots in the framework A for the bearings of the self
adjustable pressure roller, to be used when cardboard or rigid substances require
to be coated.
R' are
Tare the circular cutting knives mounted and adjustable to any position on
the bars U, by any suitable means. U are the bars for carrying the circular
knives, and are worked with bearings in the supports W, which are so constructed
that the spaces W' fit firmly upon the sides of the frame A and are screwed on with
suitable screws.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, we declare that what
we claim is
1. The use of endless strings in grooves around coating roller, for the purposes
described.
2. The combination of a pasting roller for
with endless carrying bands, as described.
coating paper at the underneath side,
3. The combination of a coating roller for coating paper at its underneath side,
with means for turning the paper the coated side uppermost, substantially as described
and shewn.
4. The combination of a mucilage roller for coating paper at its underneath
side, with endless take off strings, and means for turning the paper the coated side
uppermost.
5. The combination of a coating roller for coating paper at its underneath side,
with means for turning the paper the coated side uppermost, with carrying apparatus,
substantially as described and shewn.
6. The combination of cutting apparatus with coating roller, substantially as
described.
it
7. An apparatus for cutting strips of paper, and roller for coating the same,
with means for taking the paper off the finishing roller, and carrying away,
also for turning it the coated side uppermost, substantially as described and
shewn.
Dated this Third day of March 1890.
CHARLES HUDSON.
JOSEPH SPOOR HUDSON.