Apparatus and method for reinforcing maps for field use

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Material Information

Title:
Apparatus and method for reinforcing maps for field use
Physical Description:
Book
Creator:
Parker, L. B ( Lawrence Bemis ), 1901-
Evans, R. W
United States -- Bureau of Entomology and Plant Quarantine. -- Division of Fruit Insect Investigations
Publisher:
United States Department of Agriculture, Bureau of Entomology and Plant Quarantine ( Washington, D.C )
Publication Date:

Record Information

Rights Management:
All applicable rights reserved by the source institution and holding location.
Resource Identifier:
aleph - 30349872
oclc - 212186197
System ID:
AA00023095:00001

Full Text
ET-177 I A August 1941



United States Department of Agriculture
Bureau of Entomology and Plant Quarantine


APPARATUS AND METHOD FOR REINFORCING MAPS FOR FIELD USE

By L. B. Parker and R. W. Evans,
Division of Fruit Insect Investigations



It is believed that the information that follows will be of
interest to those who require permanent maps that will survive the
rigors and abuse of continual field use. The apparatus and pro-
cedure herein described have been developed from ideas contributed
by various members of the parasite section of the Japanr.e Beetle
Laboratory and several years of experience in their applicLtion.
If due care is used in the work, maps thus prepared are firm, free
from wrinkles, and well protected against wear.

Apparatus

The apparatus itself is comparatively simple. A pasting
flat (fig. 1) is made by screwing a piece of 1/8-inch prc'.1i.vood,
measuring 20-3/8 by 16-5/8 inches, to three cleats of white pine,
16-5/8 inches long and 1-1/8 inches thick (fig. 1). The screw
heads should be flush with the surface of the flat.

A rectangular map frame (fig. 2), measuring 20-1/2 'y 16-3/4
inches inside measurement, is made of pine stock 1-1/4 inches
square. The frame will then just fit over the pasting flat (fig.
3). On a line 3/8 inch from the inside edge of the m.ap frame,
finish nails are driven through the wood to protrude about 1 inch
on the other side. The nails should be 5/8 inch apart. 7c prevent
the frame from splitting, it is well to put a series of flat-headed
screws into it from the inside surface. These may also be tightened
from time to time if the nails work loose from use (fig. 2).

Procedure

To prepare the reinforcing cloth, cut pieces of ruilin 2
inches wider and 2 inches longer than the inside measuire..-its of
the map frame. Boil these pieces to take out the sizing and shrink
the cloth, then dry them. Stretch the cloth over the map frame by
impaling the edges on the nails, taking care to get it as tight as
possible and entirely free from any tendency to wrinkle. Next,
invert the cloth-covered map frame and fit it over the pasting







-2-


flat, with the nails pointing down and the cloth resting on the
surface of the pasting flat. After being brushed clear, the cloth
is ready for the application of the paste.

The paste is applied with a 1*-inch paint brush and is
spread evenly until the muslin is thoroughly wette thl'irough and
the paste worked into the cloth. The map is now laid in the map
frame, back to the cloth, and smoothed flat with the hands. Allow
it to remain for 2 to 3 minutes until the paper has taken up
moisture from the paste-saturated cloth, when wrinkles in the
paper will be noticed. Now part the map from the cloth to free
the wrinkles. Any wrinkles remaining after the map has again been
placed on the cloth can be effectively removed by smoothing its
surface with a wad of soft cloth, using moderate pressure against
the supporting pasting flat. This also serves to assure uniform
adherence of the map to the cloth.

The map frame is now lifted from the pasting flat and placed
in an open oven with slow heat until the cloth and paper are
thoroughly dry. Care should be taken, however, to remove the
frame from the oven immediately after they are thoroughly dry.
The cloth-backed map is removed from the frame by running a sharp
knife around its inside edge. The map edges may now be trimmed
as desired.

Folding Maps

If folding maps are desired, they can be made in the same
general manner. The paper map is first cut into the desired
sections, and these are mounted as described above, but separate,]
from one another by 1/8 inch to permit folding of the cloth. To
further protect ,iiaps for field use, an effective cover may be made
by pasting a sheet of two-ply or three-ply pressboard to the back
of each of the sections forming the two outside folds (fig. 4).

Paste

The best paste for this use is map paste, generally obtainable
from map dealers. After mixing 3 parts of water and 1 part of
paste, stir the mixture thoroughly and strain it through a 16-mesh
screen.

Note.--The size of the frame and the pasting flat to be used
would vary from the dimensions given in the foregoing description
according to the size of the map to be mounted. The frame and
flat should be slightly larger than the map.
















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Figure 1.-Details of the construction of the pasting flat.


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Sec/Ion of Insioe Surface of hfQap Frame

Figure 2.-Detaila of the construction of the map frame.


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Figure 3.-Pasting flat fitted inside the map frame.
Note: After the cloth has been stretched over the
frame the position of the latter is reversed before
the paste is applied.






























































































































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Figure 4.-Face of reinforced folding map showing method of
mounting the sections. Notice the protruding edge of the
pressboard cover along the left margin to protect the
edges of the folded map.





UNIVERSITY OF FLORIDA


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