Prepar Dars ՀՆԱԱ Bea Plate Bars Used in the Manufacture of Paper and Paper Pulp.
Year: 1887

page_text: Date of Application, 25th Feb., 1887
Complete Left, 12th Nov., 1887
Complete Accepted, 13th Dec., 1887
Prepar
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Dars ՀՆԱԱ Bea
Plate Bars Used in the Manufacture of Paper and Paper Pulp.
JAMES DICKSON Steel Manufacturer, Waverley Works. Sheffield does hereby declare
the nature of this invention to be as follows:-
Manner of preparing the Steel. The Steel is "slabbed" or drawn out into bars
suitable sizes for rolling into the required size of the Roller Bars or Bed plate bars
& is then placed in an ordinary converting Furnace in such manner that the one side
of the slab only is exposed to the carbonizing influence of the charcoal, the ends,
edges & other sides of the bars being protected with fire clay or other fire resisting
medium. The Steel is thus carbonized or hardened on the one side only to the
required degree of hardness.
The bars are then rolled or hammered into the necessary sizes & shapes for the
purpose they are destined for & are finished in the usual manner. .
Novelty of the process. When the slab prepared in the above manner is rolled or
hammered out to the finished bar the carbonized or hardened face of the Steel spreads
itself out into a thin skin of hard Steel along the front of the bar or working edge
of the bar & the bar is prevented from breaking by the support it gets from the softer
material at the back.
Advantages claimed for this process of manufacture :-
1. The hardened working face of the bar is more capable of resisting the combined
action of the acids or other chemicals deleterious to the Steel & also of the wearing
action of the friction of the bars in their revolutions in the paper making material.
2. The hardened surface is only a thin skin on the finished bar & does not interfere
with the temper or hardness of the cutting edge, which would be apt to break off if
the bars were made throughout of the harder temper of Steel.
3. The softer material at the back of the hardened face prevents the bar from
breaking & gives it the necessary amount of toughness in wear.
4. By this process I claim to be able to produce a bar capable of wearing longer &
doing its work more thoroughly than the present bars supplied for the purpose of
Paper Making.
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Plate Bars Used in the Manufacture of Paper and Paper Pulp.
I, JAMES DICKSON of Waverley Works Effingham Road Sheffield in the County
of York, Steel Manufacturer 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 :-
The Steel is "slabbed" or drawn out into bars suitable sizes for rolling into the
required size of the roller bars or bed plate bars & is then placed in an ordinary
Converting Furnace in such manner that the one side of the slab only is exposed to
the carbonizing influence of the carbonic acid gas, the ends, edges & other sides of
the bars being protected with fire clay or other fire resisting medium. The Steel is
thus carbonized or converted on the one side only to the requisite degree. The Bars
or slabs are then rolled or hammered into the necessary sizes & shapes for the purpose
required & are finished in the usual manner. When the slab prepared in the above
manner is rolled or hammered out into the finished bar the carbonized face of Steel
spreads itself out into a thin film of hard steel along the front or working edge of
the bar & the bar is prevented from breaking by the support it gets from the softer
material at the back.
Having now particularly described and ascertained the nature of my said
Invention & in. what manner the same is to be performed I declare that what I
claim is :-
1. That the particular method of combination of the carbon with the Steel by this
process produces a coating on the finished bar when rolled or hammered to shape
which will withstand the action of the chemicals used in the process of manufacture
of paper pulp better than the bars prepared in the ordinary manner.
2. That the bars. produced by this process will be protected on the working
face or edges from the friction the "roll" undergoes while revolving in the
rag engine."
3. That the prepared surface by my process being only a thin skin on the finished
bar, does not interfere with the temper or hardness of the cutting edge, which would
be apt to break off if the bars were made throughout of the harder temper of Steel.
The softer material at the back of the hardened face prevents the bar from breaking
& gives the necessary degree of toughness in wear.
1. By this process I claim to be able to produce a bar capable of wearing longer &
doing its work more thoroughly than the bars at present supplied for reducing to
pulp the various materials used in the manufacture of Paper.
Untad this 11th day of Novamhan 1807