Improved Means and Apparatus for Coating Paper, Metallic Surfaces, and the like with Adhesive or Colouring Substances.
Year: 1894

page_text: Date of Application, 9th Nov., 1894
Complete Specification Left, 8th Aug., 1895-Accepted, 12th Oct., 1895
Improved Means and Apparatus for Coating Paper, Metallic Surfaces,
and the like with Adhesive or Colouring Substances.
I, ALFRED WOODBRIDGE LOVELAND, of Hawarden House, Thorpe Road,
Norwich, Lithographic Printer, do hereby declare the nature of this invention to
be as follows:-
This invention has for object, coating the surface of paper (web or sheet)
cardboard, pasteboard, tin and other metal plates or other material with size,
varnish, gum, or other mastic, or by a colouring medium, as desired.
The invention relates to the employment of rolls so arranged that the liquified
substance is lifted by one roll from a trough, and fed to another roll which is in
contact therewith. A third roll is placed in proximity to the second roll but not
in actual touch but sufficiently close as to bear upon the paper or other material
passing through between them."
The paper or other material can be drawn, or be pushed through, as desired, and
can then pass into a chamber, or carried over a frame for drying purposes.
In cases when the paper is not of sufficient thickness to enable the third roll to
be kept clear of the second, it may be advisable to introduce a second thickness
of paper, or some other thick or thicker substance along with the paper in order
that the bearing pressure of the third roll may act thereon.
As an example of my invention, I employ a circumferentially chased, striated,
or other roughly surfaced metal roll as the lower or first roll to dip in a trough
containing the fluid, and by its revolution to lick up the fluid in a thin even strata
which it conveys and transfers to a second or plain roll running in contact with
the chased roll. This second roll may be of metal, or of rubber, or it may have
a rubber or a composition exterior, and the nip or touch is adjustable to regulate
the quantity of Huid that shall be taken off the chased roll for the second
transfer i.e. to the paper passing in contact with said second roll, the paper being
kept in even contact by pressure of the third roll bearing on the plain or uncoated
surface of the paper. This third roll is very nicely adjusted as to remain clear of
the second roll after the paper is passed out from between them.
All the rolls may be geared on the first and second rolls only, the third then
only revolving by surface contact with the paper.
I am aware that rolls chased and plain have been used for the purpose of coating
paper and other material with fluid, size, varnish, gum, oil, colour, japan, and the
like, but in those cases the fluid has been of a thin liquid character and necessitated
a flooding to make the paper in a sense imbibe the liquid in addition to pressure
by the rolls to force the liquid into the pores of the paper and ensure an equal
distribution of the globules for surfacing purposes.
By my present invention, I only by the first roll take the necessary quantity of
luid for coating the surface of the second roll, and in proportion to the absorption
roperties of the paper, the fluid being laid upon the surface.
By this invention, I an enabled to employ a comparatively thick tacky fluid
ud obtain results in evenness of surface hitherto unattained.
'Lני.
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page_text: $
+
Improved Means and Apparatus for Coating Paper, Metallic Surfaces,
and the like with Adhesive or Colouring Substances.
I, ALFRED WOODBRIDGE LOVELAND, of Hawarden House, Thorpe Road,
Norwich, Lithographic Printer, 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 has for object, coating the surface of paper (web or sheet) card-
board, pasteboard, tin and other metal plates or other material with size, varnish,
gum, or other mastic, or by a colouring medium as desired.
The invention relates to the employment of rolls so arranged that the liquified
substance is lifted by one roll from a trough, and fed to another roll which is in
contact therewith. A third roll is suspended in proximity to the second roll yet
not in actual touch but sufficiently close as to bear upon the paper or other
material passing through between them.
The paper or other material can be drawn, or be pushed through, as desired and
can then pass into a chamber, or carried over a frame for drying purposes.
In cases when the paper is not of sufficient thickness to enable the third roll to
be kept clear of the second, it may be advisable to introduce a second thickness of
paper, or some other thick or thicker substance along with the paper in order that
the bearing pressure of the third roll may act thereon.
My invention is represented in the annexed drawings.
Figure 1 transverse section and Figure 2 a front end elevation.
A frame, B trough adjustable, as the liquid is taken up, by the gear C by
turning either hand wheel C³, C¹.
D lower roller in touch with the liquid in the trough B. E second roller in
touch with roller D to lick the liquid from said roller to impart or transfer it to
under surface of paper or other material (sheet or web) passing over it in contact.
F table leading the paper or other material in a flat condition towards and along
the table assisted by the guide roll G if web material, as at H, be used, but on
which table sheets can be laid in succession with a slight overlap at meeting edges
if desired.
The material after the coating, is passed into or taken to a drying chamber or
frame to be spread out for drying purposes.
I is the third or upper roller suspended from the adjustable gear J, J, to just
bear on the material for surface contact with roller either directly or on an inter-
vening strip, the adjustment being such that it should not come in contact with the
liquid matter on roller E if the paper by chance happens to pass clear of that
roller.
The roller D is striated circumferentially, or chased, or otherwise marked to
suck and carry up a thin film of the liquid from the trough B which said roller
transfers to roller E in equal and uniform condition without flooding at the line of
touch. The roller E may be of rubber or be coated with rubber composition say
like a printer's roller.
If found advisable an extra roller (rubber or metal) can be caused to bear
against the roller E to prevent a surplus quantity of liquid being drawn from the
trough.
The liquid in the trough can be slowly agitated by a rake or other appliance to
prevent undue precipitation of any flocculent matter that may be contained in it.
By this invention, I am enabled to employ a comparatively thick tacky fluid and
obtain results in evenness of surface hitherto unattained.
Any of the lower rollers may be heated as well as the trough to help keeping
the liquid body liquified, if desired.
:

page_text: Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. The improved means and apparatus for coating paper, metallic surfaces, and
the like with adhesive or colouring substances, as herein before described and
represented on the drawings.
2. The employment of three rollers, one striated or chased, one plain arranged
in a frame, and one suspended from the frame for adjustment as set forth and
substantially as shown.
བསསྡུསབས ༦
H. GARDNER,
Patent Agent, 166 Fleet Street, London,
Agent for the said Aifred Woodbridge Loveland.