US2173218A - Method for whetting files, rasps, and the like - Google Patents

Method for whetting files, rasps, and the like Download PDF

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Publication number
US2173218A
US2173218A US169753A US16975337A US2173218A US 2173218 A US2173218 A US 2173218A US 169753 A US169753 A US 169753A US 16975337 A US16975337 A US 16975337A US 2173218 A US2173218 A US 2173218A
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bath
water
files
articles
weight
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US169753A
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Zoppi Emanuele
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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F1/00—Etching metallic material by chemical means
    • C23F1/06—Sharpening files

Definitions

  • This invention relates to a method for whetting filgsl, rasps and the like by etching by means of It has already been previously proposed to dip files to be whetted into an acid bath without preliminary treatment.
  • This method has the disadvantage that the files were considerably reduced in weight, whilst the whettlng obtained only lasted for a very short time. This method is therefore not of practical value.
  • the grease is first removed from files by treating them in an alkaline bath, they are then treated in a bath of hydrochloric acid, then in a bath of nitric acid and subsequently in a bath of hydrochloric acid, whereupon any acid which may be adhering thereto is neutralised.
  • the advantage of the new method resides in the fact that the baths which are used can be produced at low costs, that the files do not lose in weight as a result of the treatment, and the method can be carried out byfan unskilled workman.
  • the new method it is possible to obtain in an economical manner sharp g5 and resistant teeth.
  • the method may be carried out for example as follows.
  • the files are then placed into a second bath consisting of 50 parts by weight commercial hydrochloric acid and 50 parts by weight of water.
  • the files are allowed to remain in this bath for 12 hours without the application of heat.
  • This third bath may be regarded as the renewing bath, it consists of 20 parts by weight of nitric acid of 42 B. and 80 parts by weight of water. The files are allowed to remain in this 4!! bath for from 5-10 minutes without the applica tion of heat.
  • the washing of the files between the treatments in the separate baths is preferably effected in hot water. Further it is preferable when taking the files from one bath to immediately placethem 20 into the washing water and from the washing water immediately into the next bath so that on the passage from one bath to the other they are not exposed to the air for too long a period of time.
  • the files are preferably placed into the baths in a vertical position.
  • the method of sharpening files, rasps and the like which comprises the following steps in 30 the order mentioned. viz: first, subjecting the articles to the de-greasing action of a boiling alkaline bath consisting of 50 g. of NaOI-I to one litre of water; second, removing the articles from the alkaline bath and rinsing them in water; third, placing the rinsed articles in a bath consisting of approximately equal parts by weight of hydrochloric acid and water, for about twelve hours, at normal temperature: fourth, removing the articles from the hydrochloric acid bath and 40 again rinsing them in water; fifth, placing the rinsed articles in a bath consisting of twenty parts by weight of nitric acid of 42 B.
  • the method of sharpening files, rasps and the like which comprises the following steps in 60 the order mentioned, viz: first, subjecting'the articles to the de-greasing action of a boilingv alkaline bath consistingof 50 g. of NaOI-I to one litre of water; second, removing the articles from the alkaline bath and rinsing them in water; so
  • third placing the rinsed articles in a bath consisting of approximately equal parts by weight of hydrochloric acid and water, for about twelve hours, at normal temperature; fourth, removing the articles from the hydrochloric acid bath and again rinsing them in water; fifth, placing the rinsed articles in a bath consisting of twenty parts by weight of nitric acid of 42 B. and eighty parts by weight of water, for from five-to ten minutes, at normal temperature; sixth, removing the articles from the nitric acid bath and after rinsing the same, placing the articles again in a.
  • hydrochloric acid bath like that of the third the like, which comprises the following steps in the order mentioned, viz: first, subjecting the articles to the de-greasing action of a boiling alkaline bath consisting of g. of NaOH to one litre of water; second, removing the articles from the alkaline bath and rinsing them in water; third, placing the rinsed articles in a bath consisting of approximately equal parts by weight of hydrochloric acid and water, for about twelve hours, at normal temperature; fourth removing the articles from the hydrochloric acid bath and again rinsing them in water; firth, placing the rinsed articles in a bath consisting of twenty parts by weight of nitric acid of 42 B.
  • the method of sharpening flies, rasps and the like which comprises the following steps in the order mentioned, viz: first, subjecting the articles to the de-greasing action of a boiling alkaline bath consisting of 50 g.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Processing Of Solid Wastes (AREA)
  • Meat, Egg Or Seafood Products (AREA)

Description

Patented Sept. 19, 1939 PATENT OFFICE METHOD FOR wm-z'r'rmo mas, misrs, AND run mm Emanuele Zoppi,
Genova. Italy No Drawing. Application October 18, 1937, Se-
rlal No..169,753. In Germany November 26,
This invention relates to a method for whetting filgsl, rasps and the like by etching by means of It has already been previously proposed to dip files to be whetted into an acid bath without preliminary treatment. This method has the disadvantage that the files were considerably reduced in weight, whilst the whettlng obtained only lasted for a very short time. This method is therefore not of practical value. According to the present invention the grease is first removed from files by treating them in an alkaline bath, they are then treated in a bath of hydrochloric acid, then in a bath of nitric acid and subsequently in a bath of hydrochloric acid, whereupon any acid which may be adhering thereto is neutralised.
' The advantage of the new method resides in the fact that the baths which are used can be produced at low costs, that the files do not lose in weight as a result of the treatment, and the method can be carried out byfan unskilled workman. By means of the new method it is possible to obtain in an economical manner sharp g5 and resistant teeth. The method may be carried out for example as follows.
For the removal of grease there is used a soda lye containing 50 g. caustic soda (NaOI-I) to one litre of water. In this lye the files are boiled for 80 about half an hour. The files are then removed from the lye and rinsed in water and brushed.
The files are then placed into a second bath consisting of 50 parts by weight commercial hydrochloric acid and 50 parts by weight of water. The files are allowed to remain in this bath for 12 hours without the application of heat.
In this bath all adhering substances are removed and the surface is prepared for the succeeding third bath in which the files after having been again rinsed and brushed are placed.
This third bath may be regarded as the renewing bath, it consists of 20 parts by weight of nitric acid of 42 B. and 80 parts by weight of water. The files are allowed to remain in this 4!! bath for from 5-10 minutes without the applica tion of heat.
During the first moments there are formed fine bubbles which adhere to the points of the teeth, enclose these and protect them against the action of the acid. After 2-3 minutes the bubbles disappear and the bath can attack the whole file. It is important during the treatment in the third bath to repeatedly withdraw the files therefrom and to again immerse them therein.
us After treatment in the third bath the files are 4 Claims. 01. -24) again washed and brushed. They are then placed for a period of 5-10 minutes into a fourth bath which has the same composition as the second bath. After rinsing and brushing the files are treated in a fifth bath which consists of water 5 and unslaked lime.
For this purpose there are used 5 litre of water and about 100 g. unslaked lime (09.0). It is sufiicient if the files are allowed to remain in this bath for about 10-20 minutes. They may howit) ever be allowed to remain, therein for a longer time (hours or days).
After treatment the files are again washed and brushed. They are then dried for example in saw-dust or by means of an air current and finally l5 greased, preferably with mineral oil.
The washing of the files between the treatments in the separate baths is preferably effected in hot water. Further it is preferable when taking the files from one bath to immediately placethem 20 into the washing water and from the washing water immediately into the next bath so that on the passage from one bath to the other they are not exposed to the air for too long a period of time.
The files are preferably placed into the baths in a vertical position.
I claim:
1. The method of sharpening files, rasps and the like, which comprises the following steps in 30 the order mentioned. viz: first, subjecting the articles to the de-greasing action of a boiling alkaline bath consisting of 50 g. of NaOI-I to one litre of water; second, removing the articles from the alkaline bath and rinsing them in water; third, placing the rinsed articles in a bath consisting of approximately equal parts by weight of hydrochloric acid and water, for about twelve hours, at normal temperature: fourth, removing the articles from the hydrochloric acid bath and 40 again rinsing them in water; fifth, placing the rinsed articles in a bath consisting of twenty parts by weight of nitric acid of 42 B. and eighty parts by weight of water, for from five to ten minutes, at normal temperature; sixth, remov- 45 ing the articles from the nitric acid bath and after rinsing the same, neutralizing any adhering acid in a milk of limebath.
' 2. The method of sharpening files, rasps and the like, which comprises the following steps in 60 the order mentioned, viz: first, subjecting'the articles to the de-greasing action of a boilingv alkaline bath consistingof 50 g. of NaOI-I to one litre of water; second, removing the articles from the alkaline bath and rinsing them in water; so
third, placing the rinsed articles in a bath consisting of approximately equal parts by weight of hydrochloric acid and water, for about twelve hours, at normal temperature; fourth, removing the articles from the hydrochloric acid bath and again rinsing them in water; fifth, placing the rinsed articles in a bath consisting of twenty parts by weight of nitric acid of 42 B. and eighty parts by weight of water, for from five-to ten minutes, at normal temperature; sixth, removing the articles from the nitric acid bath and after rinsing the same, placing the articles again in a. hydrochloric acid bath like that of the third the like, which comprises the following steps in the order mentioned, viz: first, subjecting the articles to the de-greasing action of a boiling alkaline bath consisting of g. of NaOH to one litre of water; second, removing the articles from the alkaline bath and rinsing them in water; third, placing the rinsed articles in a bath consisting of approximately equal parts by weight of hydrochloric acid and water, for about twelve hours, at normal temperature; fourth removing the articles from the hydrochloric acid bath and again rinsing them in water; firth, placing the rinsed articles in a bath consisting of twenty parts by weight of nitric acid of 42 B. and eighty parts by weight of water, for from five to 4. The method of sharpening flies, rasps and the like, which comprises the following steps in the order mentioned, viz: first, subjecting the articles to the de-greasing action of a boiling alkaline bath consisting of 50 g. of NaOH to one litre of water; second, removing the articles from the alkaline bath and rinsing them in water; third, placing the rinsed articles in a bath consisting of approximately equal parts by weight of hydrochloric acid and water, for about twelve hours, at normal temperature; fourth, removing the articles from the hydrochloric acid bath and'ag'ain rinsing them in water; fifth placing the rinsed articles in a bath consisting of twenty parts by weight of nitric acid of 42 B. and eighty parts by weight of water, for from five to ten minutes, at normal temperature; sixth, removing the articles from the nitric acid-bath and after rinsing the same, placing the articles again in a hydrochloric acid bath like that of the third step above; seventh, removing the articles from the last acid bath and after rinsing the articles, neutralizing any acid adhering there-
US169753A 1936-11-26 1937-10-18 Method for whetting files, rasps, and the like Expired - Lifetime US2173218A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2173218X 1936-11-26
DE483698X 1936-11-27

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050069837A1 (en) * 2003-05-13 2005-03-31 Paul Lewis Methods for manufacturing endodontic instruments
US6968619B2 (en) 2003-05-13 2005-11-29 Ultradent Products, Inc. Method for manufacturing endodontic instruments
US20060185169A1 (en) * 2005-02-23 2006-08-24 Paul Lewis Methods for manufacturing endodontic instruments
US20070116532A1 (en) * 2005-11-18 2007-05-24 Ultradent Products, Inc. Methods for manufacturing endodontic instruments by milling
US7743505B2 (en) 2005-02-23 2010-06-29 Ultradent Products, Inc. Methods for manufacturing endodontic instruments from powdered metals

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3332804C2 (en) * 1983-09-12 1986-10-23 Hollingsworth Gmbh, 7265 Neubulach Process for treating the edges of a sawtooth wire for clothing in textile machines

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050069837A1 (en) * 2003-05-13 2005-03-31 Paul Lewis Methods for manufacturing endodontic instruments
US6968619B2 (en) 2003-05-13 2005-11-29 Ultradent Products, Inc. Method for manufacturing endodontic instruments
US7398598B2 (en) 2003-05-13 2008-07-15 Ultradent Products, Inc. Methods for manufacturing endodontic instruments
US20060185169A1 (en) * 2005-02-23 2006-08-24 Paul Lewis Methods for manufacturing endodontic instruments
US7665212B2 (en) 2005-02-23 2010-02-23 Ultradent Products, Inc. Methods for manufacturing endodontic instruments
US7743505B2 (en) 2005-02-23 2010-06-29 Ultradent Products, Inc. Methods for manufacturing endodontic instruments from powdered metals
US20070116532A1 (en) * 2005-11-18 2007-05-24 Ultradent Products, Inc. Methods for manufacturing endodontic instruments by milling
US7322105B2 (en) 2005-11-18 2008-01-29 Ultradent Products, Inc. Methods for manufacturing endodontic instruments by milling

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