Requirements for Unity of Application - Japan Patent Office
Requirements for Unity of Application - Japan Patent Office
Requirements for Unity of Application - Japan Patent Office
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[Example 64]<br />
[Title <strong>of</strong> the Invention]<br />
A process <strong>of</strong> electroslag welding and the flux to be used<br />
[Claims]<br />
1. Light metal electroslag welding process, wherein after arranging the parts (1) to be welded<br />
together with specified gaps, inserting an electrode (3) from below the pieces into a gap<br />
together with flux fill (4) the makeup <strong>of</strong> which is 65-75% barium fluoride, 15-25% cryolite<br />
and 5-10% (by weight) sodium bromide and placing the vessels (13, 14) above and below<br />
the pieces, applying current to melt the electrode and the flux <strong>for</strong> floating up the molten<br />
metal from a slag bath (5), <strong>for</strong>ming the molten metal bath in the upper vessel (7), and<br />
opening the lower vessel by the melted electrode, and allowing the slag (5) into the said<br />
vessel, which introduces molten metal into the gap between the pieces to be welded.<br />
2. Flux <strong>for</strong> the electroslag welding comprising the following matter (weight %):<br />
65-75% barium fluoride, 15-25% cryolite and 5-10% sodium bromide<br />
[Excerpt from Detail Description <strong>of</strong> the Invention and Drawings]<br />
This invention concerns a process <strong>of</strong> electroslag welding <strong>for</strong> aluminum and other light<br />
metals using consumable electrodes and flux used in welding by this process.<br />
In welding aluminum and other light metals, the mechanical strength <strong>of</strong> the welded portion<br />
could be weakened by oxidation or penetration <strong>of</strong> gases. In this invention, by using the slag<br />
bath (5) which is heavier than the metals being welded (1), using a new flux (4) having a higher<br />
melting point and inserting the electrode (3) from below, as well as placing the molten metal<br />
bath (7) above the slag bath (5) prevents oxidation <strong>of</strong> the welding part by the slag bath (5) and<br />
maintains the molten state <strong>of</strong> the metal by the heat <strong>of</strong> the slag bath and degas the metal.<br />
Upper vessel<br />
Molten metal<br />
Flux<br />
Slag bath<br />
Piece to be welded<br />
Lower vessel<br />
During welding<br />
Completion stage<br />
[Explanation]<br />
The related invention (Claim 2), the flux does not correspond to “equipment” directly used<br />
in working the invented process, but it falls under the category <strong>of</strong> “other things.”<br />
[Concerned Section]<br />
<strong>Patent</strong> Law Section 37(iv)<br />
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