IMPROVEMENTS IN MACHINERY FOR APPLYING LINING TO STRAW Board and other Substances
Year: 1873

page_text: PROVISIONAL SPECIFICATION left by Alexander Melville Clark at the
Office of the Commissioners of Patents, with his Petition, on
the 5th February 1873.-A communication from abroad by Georgo
Solomon Levy, of the City, County, and State of New York,
United States of America.
I, ALEXANDER MELVILLE CLARK, of 53, Chancery Lanc, in the
County of Middlesex, Patent Agent, do hereby declare the nature of
the said Invention for "IMPROVEMENTS IN MACHINERY FOR APPLYING LINING
TO STRAW Board and other Substances,” to be as follows :—
In the manufacture of paper boxes at the present time the thin paper
lining of the boxes is applied to the large straw board sheets by hand
before they are cut up into pieces for the boxes, the straw board or the
lining being coated with paste on one side and the two being pasted
together. The pasting moistens the board on one side to such extent
that it has to be hung up to dry. The large quantities used demand
great drying space; the process of drying is slow unless artificial heat is
used, and at best the work is imperfect and consequently the application
of this paper lining involves a large share of the expense of the business

page_text: of paper box making. The work is so imperfect in consequence of the
failure of the workman to put the lining on smooth, and the rolling of
the board and blistering of the paper on account of the unequal
expansion and contraction caused by the moistening of one side, and the
lack of means for keeping the sheets in shape while drying, that a
smoothing process by powerful and expensive hydraulic presses has
to be employed after the drying to render the covered or lined board
the board and blistering of the paper on account of the unequal
expansion and contraction caused by the moistening of one side, and the
lack of means for keeping the sheets in shape while drying, that a
smoothing process by powerful and expensive hydraulic presses has
to be employed after the drying to render the covered or lined board
Le
ut for uso.
To cheapen the cost of the work, economize space in the room
required, also to save the cost of the expensive presses used, and to
greatly improve the quality of the work done I provide a machine tho
essential elements of which are-
1st. Pasting apparatus and carrying rolls for the thin paper and the
straw board to be lined, also an endless carrier for the latter arranged to
paste the thin lining paper, lay it on the straw board, and unite it thereto
by pressure.
2ndly. A steam heated calendering and drying cylinder, and carrying
apron in connection therewith, and delivering carriers and rolls for
drying, calendering, and delivering the lined board, by which, either
alone for the lining of sheets previously made, or in connection with the
paper making machine so as to receive the finished sheets as they
are delivered therefrom, I can do the work in a superior manner
at much less cost, and deliver it ready for the box maker's art.
Another feature of the improved machine is a construction of the
calendering roller of an inside cylinder and au outside cylinder connected
together at the ends, steam-tight, so as to form an annular space for the
steam used for heating, whereby less heat is lost by radiation and the
roller is made capable of sustaining greater pressure to the square
inch, and the load of water of condensation to be carried is diminished.
The operative parts of the machine are supported on a long rectan-
gular frame of any suitable sort, in front of which at one end is a feeding
table whereon the sheets of cardboard are placed to be fed into the
machine when they are previously cut into squares or small pieces of
any shape. A small carrying roller is provided at the inner edge of this
feeding table with guards suspended above it to insure the presenting of
the sheets edge to edge, between which roller and guards the said sheets

page_text: are ied into the machine upon an endless carrying apron to be carried
along between pairs of carrying and pressing rollers to a large calender
roller.
Between the first pair of pressing rollers the lining paper is laid on
the cardboard, the said lining paper being in a long sheet rolled on a
paper roller on the upper part of the frame of the machine, and passing
between pasting rollers and over a guide roller to the said pressing
rollers. The lower pasting roller works partly in a trough containing
pasto to be taken up regularly and evenly and delivered to the under side
of the lining paper. The paste is maintained at a uniform height in
this trough so as to be fed regularly to the paper by a pump which
brings it up from a reservoir below and an overflow pipe through which
the excess flows back to the reservoir again.
From the pressing and carrying roller the cardboard with its lining,
which is laid on firm and smooth, is carried under and over the large
drying or calendering roller nearly a complete revolution to a roller,
around which it passes with the carrying apron before mentioned, and
between it and some carrier tapes over a guide roller down through
carrier rollers and endless carrier belts, and between small calender
roller on to the delivering table, whereon the cardboard issues lined,
pressed, and dried, in a superior manner and ready for use. Scrapers or
dischargers are provided for preventing the paper from sticking to the
respective rollers with which they are arranged. A deflector is arranged
in connection with the lower of the second pair carrying and pressing
rollers to ensure the passage of the card downward under the drying
roller with the carrier.
At the roller around which the cardboard and carrier pass from the
drying or callendering roller some curved fingers for taking the card.
board off from the drying roller are arranged to bear upon its surface,
and fitted nicely with the surface of the roller to insure the greatest
efficiency in taking the card from the one and causing it to go on
the other. A pair of rollers each of which extends from the middle of
the sheet of lining paper to the edge, one on cach side, are provided, and
at the inner ends they are arranged a little in advance of the other ends
so as to brush out the wrinkles from the centre to the edges as the paper
moves along from the pasting rollers. A single roller with a right and
left spiral rib beginning at the centre will serve as well.

page_text: The upper pasting roller is fixed on springs which are released
whenever there is no paper to run between these two to raise it and
prevent it from running in contact with the other and becoming
pasted.
The improvement in the construction of the drying roller consists in
a narrow steam space inclosed by the outer and inner shell and by the
rims at the ends, by which the quantity of steam required for heating is
lessened, the cylinder is made stronger to withstand the steam pressure,
and I avoid the objectionable accumulation of water in the cylinder by
condensation, which so loads it that much unnecessary loss of power is
incurred in driving it.
As the water of condensation can only run out at one of the journals
the cylinder is necessarily so loaded when constructed in the common
way, but when constructed on this plan it is only the steam spaco
between the inner and outer sliclls that fills up to the level of the escape 1
pipe. In connection with this steam space I employ radial pipes for
connecting it with the journals, one for the inlet for steam, and the
other for the outlet for water.
This machine is alike useful for pasting thin muslin or linen on paper
for collars and cuffs, also for pasting one flexible fabric of any kind on
another, and I propose to use it for any and all such purposes as I
may wish.