The story of the invention of steel pens : $b with a description of the manufacturing process by which they are producedBore, Henry
History
The story of the invention of steel pens : $b with a description of the manufacturing process by which they are produced
Bore, Henry
Pens
The blanks are now soft and pliable, readily taking the various shapes
into which pens are made by the next process, called _raising._ This
operation is performed by the aid of a punch and die fitted into a
screw-press. The punch is fitted into a contrivance called a false
nose, fixed in the bottom of the screw of the press; and the die or
bed is placed in a cylindrical piece of steel (called a bolster) with
a groove cut for the reception of the die, the bolster being fastened
to the bottom of the press by a screw underneath. The punch and die
being fixed so as to exactly fit each other, the toolmaker places a
small piece of tissue paper between them, takes an impression,
examines it, and proceeds to rectify any inequality in the pressure,
so as to insure perfection in the shape. This being accomplished, the
toolmaker fixes four pieces of steel (called guides) to the bolster in
such positions that the operator is enabled to slide the blank into
the bed, where it is held by the guides till the punch descends,
forces the blank into the bed, and gives the pen its shape. The
article is now narrower than it was in its blank form, and the girl
pushes it through the tools with a small stick held in the hand with
which she works the press handle, while with the other hand she places
another blank in its position in the bed.
The pen is now shaped or raised, but it is still soft, and
consequently another process is necessitated--_hardening._ This is
effected by placing the pens in thin layers in round pans with lids.
They are placed in the muffle for a period varying from twenty to
thirty minutes, during which time they have acquired a bright red
heat. The workman then withdraws them and empties the contents into a
large bucket immersed in a tank of oil. The bucket is perforated at
the bottom, and being elevated, the oil drains off. The pens are next
placed in a perforated cylinder, which, being set in motion, revolves
and drains off the remainder of the oil. The pens are still greasy,
and as brittle as glass; and in order to free them from the grease
they are again placed in perforated buckets and immersed in a tank of
boiling soda water. After they are freed from the grease the pens are
put into an iron cylinder, which is kept revolving over a charcoal
fire until they are softened or tempered down to the special degree
required. In this process the workman is guided by the color, which
indicates the varying temperature of the metal of which the articles
are made. Brittleness has given place to pliability, but the pens are
black in color and scratch at the point, and to remedy this defect
they are subjected to the next process--_scouring._ In order to do
this the pens are dipped in a bath of diluted sulphuric acid--called
pickle--which frees the articles from any extraneous substances they
may have acquired in the hardening and tempering processes. This
requires to be done with great care, or the acid would injure the
steel.
Public-domain text, read in full here on John Shaqi.
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