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Патент USA US2105608

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Jan. 18, 1938.
M, M, MERRITT
2,105,608
PORTABLE WORK SUPPORT
Filed Feb. 25, 1936
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2,105,608
Patented Jan. 18, 1938
UNITED‘ STATES PATET
FFICE
2,105,608
PORTABLE WORK SUPPORT
Matthew M. Merritt, Middleton, Mass, assignor
to The Tanning Process Company, Boston,
Mass, a corporation of Massachusetts
Application February 25, 1936, Serial No. 65,680
(Cl. 149—12)
2 Claims.
,
This invention relates to portable work sup
ports of boards or other_suitable sheet material
for use in putting-out operations upon hides and
skins, particularly when said operations are to
"5 be followed‘by drying of the hides or skins in
extended condition on the portable work sup
ports. It is to be understood, however, that the
invention and various important features thereof
10
may have other applications and uses.
As heretofore constructed, boards for use in
putting-out or setting-out operations upon hides
and. skins have quite commonly consisted of
sheets of a paper composition which have been
waterproofed and varnished on both surfaces.
‘15 These boards are used. in methods which involve
the use of paste to secure the adhesion of the
skin to the board during the drying operation.
They are not suitable for putting-out operations
when it is desired to secure the put-out hide or
20 skin to the board by means of fastenings such as
tacks or staples, for the reason that the hard
varnished surface of the board will turn the
points of light staples and for the additional rea
son that such fastenings as tacks or staples would
25 soon destroy the varnished surface and render
it pervious to water and other liquids, in which
case the board would quickly deteriorate and
become warped. While glass has been used in
sheets as material for putting-out work supports,
:30 experience has taught that such material is not
satisfactory because of its weight and its liability
to breakage. While aluminum sheets have met
with wider acceptance among tanners, such ma
terial is expensive and is apt to color undesirably
35 certain light-colored leathers. Obviously, both
glass and aluminum sheets are useful only when
the method involves the use of paste as the means
for securing the hides or skins in place during the
drying operation.
40
It is an object of this invention to provide an
improved putting-out and drying board which
will be inexpensive to manufacture and to main
tain in good condition while at the same time
being especially durable even though light fasten
45 ings, such as staples, be used as securing means
for the work pieces on the boards. It is a further
object of the invention to produce a board less
liable to injury than other boards and which will
make less demands upon the strength and en
50 durance of the worker, due to its relative light
ness.
These and other objects and advantages are
secured by utilizing plywood as the foundation
member of the board, this material having the
55 advantage of resisting warping and other bending
forces, due to the different directions of the grain
in adjacent plies which together make up the
board. To provide a waterproof surface there
is secured, to a smooth surface of the plywood, a
sheet of material having an oil-treated surface, en
a layer of a plastic adhesive cement such as latex
being utilized to secure the sheet material to the
plywood. Conveniently, oilcloth is utilized as
the waterproof material since it is a cheap com
merical product which presents a waterproof sur
face upon which a hide or skin may be put out
either by hand or by a suitable machine, and
with which either paste or fastenings, such as
?ne staples, may be used to secure the skin against
displacement during the subsequent drying oper- 15
ation.
The oilcloth provides an especially ad
hesive surface, so much so that a minimum of
paste or of fastenings is required to maintain
the skin in extended condition on the drying
board during drying thereof. Furthermore, both 20
the oilcloth and the latex cement are readily
penetrable by ?ne fastenings, such as light staple
wire, so that it is entirely feasible to use the light
est of wire staples. The openings made by these
fastenings appear to close, nearly if not com
pletely, after the removal of a staple, due in part
at least to the spreading of the latex cement by
blade action during subsequent putting-out oper
ations on pieces of work. At any rate, water and
other liquids do not readily penetrate the surface 30
provided by the oilcloth and the latex cement.
There is the additional advantage that the boards
may be readily reconditioned simply by stripping
the old oilcloth from the surface of the plywood
and replacing it by another sheet of oilcloth se
cured by a fresh layer of latex cement. When
thus reconditioned the boards are ready for im
mediate use, whereas aluminum sheets are usu
ally treated chemically prior to use by experts
along that line. Furthermore, the prior-art
boards of paper composition, which have been
reconditioned by sand-papering and revarnish
ing, may be put in use only after several days
have elapsed since they require thorough and
careful drying of the varnished surfaces. Since 45
these improved boards may be made of a com
mon grade of plywood covered with ordinary oil
cloth to provide the desired waterproof surface,
it is clear that there is produced an inexpensive
board which ‘may be readily reconditioned and
which is exceptionally durable, while at the same
time being so light in weight as to minimize the
labor required in its manipulation. It is to be
understood, however, that some of the advan
tages of the invention may be secured by utiliz- 55
2
2,105,608
ing paperboard as the foundation member and
providing it with a waterproof layer of fabric
secured by a rubber cement such as latex.
These and other important features of the in
vention and novel combinations of parts will now
-be described in detail in the speci?cation and
then pointed out more particularly in the ap
pended claims.
In the drawing,
,
Fig. 1 is a plan view showing a drying board
with a skin spread out thereon; and
.. .
Fig. 2 is an enlarged _view along the line II-“II
of Fig. 1, showing the layers which compose the
board.
In the illustrated embodiment of the invention,
which is designed particularly to serve as a sup
port for a hide or skin undergoing putting-out
and drying operations, there is provided a ply
wood board 4 of the three layers 6, 8, NJ, the grain
of the layers 6 and ill extending in the same di
rection and substantially at a right angle to the
grain of the intermediate layer 8. The layers of
'
the board are united in the illustrated construc
tion by the use of a substantially water-resistant
glue or cement. A plywood board suitable for
use in putting-out operations on sheepskins will
' be about three-eighths of an inch thick and about
four by four and a half feet in its width and
30
length dimensions.
7
Secured to one surface of the plywoodrby means
of a latex cement I2 is a layer of oilcloth M with
its oil coat exposed. The oilcloth, therefore, pro
vides a waterproof surface to the board. The oil~
at temperatures up to 200° F'., nor does it harden
but remains soft and plastic so that it is readily
penetrable by light wire staples and apparently
tends to close openings made by the removal of
the staple fastenings. In any case it is a fact
that water does ‘not penetrate readily the ?ne
openings made by the wire staples and hence the
boards remain in good condition through many
months of hard service in the putting-out and
drying of‘hides and skins. Moreover, this latex 10
J cement is of such a consistency, after months of
use, that the fabric layer may be readily stripped
from the foundation layer after which a fresh
waterproof layer may be applied with the aid of
additional latex cement and without the neces 15
sity of removing any of the old cement layer.
Probably the closing of the staple punctures is
due in large part to‘a spreading action on the
layergof plastic cement while the slicker blades
are operating to spread a piece of work out on 20
the oilcloth layer. However, this unexpected ad
vantage of the latex layer, together with its re
sistance to deterioration under the conditions
mentioned, make it a most desirable substance as
an adhesive layer between the waterproof fabric 25
and the foundation member. Alternatively, an
unvulcanized rubber cement of suitable consist
ency may be used in place of the latex. At the
present time there are in the market certain syn
thetic plastic adhesives having some of the qual '30
ities of unvulcanized rubber which may be substi
tuted for the true rubber cements, in securing the
waterproof
layer to the foundation layer, should
cloth has the additional advantage of providing a ' they become less expensive to manufacture.
35 surface which is quite adhesive with respect to 2.
hide or skin put out thereon.
‘This is true to such
an extent that only a small amount of paste is re
quired to secure adhesion of the skin to the board
throughout the drying operation. At the same
40 time this surface does not prevent the desired
extension of the area of the skin during the put
ting-out operation. Where ?ne wire staples are
used in place of paste to secure the hide or skin
to this board it will be found that but relatively
few fastenings are required to maintain the skin
against displacement during the drying opera—
tion.
The layer of latex cement is an important fea
ture of‘the improved putting-out board. It is
particularly ef?cient as a means for securing the
waterproof fabric to the foundation piece since
it retains its adhesive property during both put
ting-out operations and during drying operations
It will be understood, of course, that'if it is
desired to secure a skin, like that shown at I6 in
Fig. 1 of the drawing, to each side of the board
4 a layer of oilcloth M will 'be' secured to each
of the surfaces of said board.
Having described my invention, what I claim as ~40
new and desire to secure by Letters Patent of the
United States is:
*
'
'
'1. A drying board for use in vputting-out and
drying operations upon hides ,or skins comprising
a foundation layer of plywood, and an oil-painted 1"
layer of a textile fabric cemented to the plywood.
2. A drying board for use in putting-out and
drying operations upon hides or skins comprising
a foundation layer of plywood, a layer of a plastic
adhesive cement, and a layer of oilcloth secured
to the plywood by said cement.
MA'I'I'HEW M. ‘MERRITI'. .
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