US1155057A - Treatment of cork. - Google Patents

Treatment of cork. Download PDF

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Publication number
US1155057A
US1155057A US3736315A US3736315A US1155057A US 1155057 A US1155057 A US 1155057A US 3736315 A US3736315 A US 3736315A US 3736315 A US3736315 A US 3736315A US 1155057 A US1155057 A US 1155057A
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United States
Prior art keywords
cork
treatment
temperature
heating
temperatures
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US3736315A
Inventor
Max Grunzweig
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ARMSTRONG CORK AND INSULATION Co
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ARMSTRONG CORK AND INSULATION Co
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Application filed by ARMSTRONG CORK AND INSULATION Co filed Critical ARMSTRONG CORK AND INSULATION Co
Priority to US3736315A priority Critical patent/US1155057A/en
Application granted granted Critical
Publication of US1155057A publication Critical patent/US1155057A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
    • C04B20/02—Treatment
    • C04B20/04—Heat treatment
    • C04B20/06—Expanding clay, perlite, vermiculite or like granular materials

Definitions

  • cork may be expanded by' heating it to high temperatures, preferably above 200 C. It has been found that the expansion of cork may be obtained not only by raising its temperature considerably, but by utilizing other agents at the same time.
  • cork contains a certain degree of moisture, as the cork of the trade always does, the evaporation of the water contained in the cork cellules tends to expand the same.
  • the energy of expansion is increased if the cork is heated as rapidly as possible, approaching the point where the evaporation is effected in the manner of an explosion.
  • the apparatus used hitherto for heating cork retain the cork for a relatively extended length of time; and the desired maximum temperature is reached in amoderately quick way. That is the reason why the pressure insidethe cellules of the cork is weak and the expansion isnot carried to its maximum. If however, the heating lasts only'a half a minute to five minutes and the cork is moist enough, a considerable increase of volume may be attained at a 'temperaturelittle above the ebullition point of water, an expansion which was hitherto possible only at temperatures above 200 C. because the pressure of steam is considerable at temperatures between 100 C. and 150 C. In orderto heat the cork in so short a time up to a temperature of from 100 C.
  • the cork may of course be heated up to the permissible maximum of about 400 C.
  • cork thus expanded may be .used in known way to form cork stone with or without a cement, as loose fillingmaterial and the like. 7 l Now what I claim and desire to secure by Letters Patent is the following: a
  • a method to increase suddenly the volume of. cork particles at temperatures above 100 C. which consists in placing sufliciently moist corkparticles in a chamber previously highly heated and agitating the cork.

Description

K Metre 2a,!
fihh iifid PATENT @FFIWE.
FIRM F ARMSTRONG CORK AND INSU LATION COMPANY, OF PITTSBURGH, PENN- manta Sept. as, 1015.
SYLVANJLA.
TREATMENT OF CORK.
1355357. Specification of Letters Patent.
No Drawing. Application filed June 30, 1915. Serial No. new.
To all whom it may concern:
Be itknown that 1, Max GRUNZWEIG, Dr. ling, citizen of the German Empire, and residentof Ludwigshafen on the Rhine,
5 Germany, have invented new and useful improvements in the Treatment of Cork, of which the following is a-specification.
Applicant has shownin his prior Patent No. 997050 that cork may be expanded by' heating it to high temperatures, preferably above 200 C. It has been found that the expansion of cork may be obtained not only by raising its temperature considerably, but by utilizing other agents at the same time.
If cork contains a certain degree of moisture, as the cork of the trade always does, the evaporation of the water contained in the cork cellules tends to expand the same. The energy of expansion is increased if the cork is heated as rapidly as possible, approaching the point where the evaporation is effected in the manner of an explosion.
The apparatus used hitherto for heating cork, such asrevolving furnaces, and the like, retain the cork for a relatively extended length of time; and the desired maximum temperature is reached in amoderately quick way. That is the reason why the pressure insidethe cellules of the cork is weak and the expansion isnot carried to its maximum. If however, the heating lasts only'a half a minute to five minutes and the cork is moist enough, a considerable increase of volume may be attained at a 'temperaturelittle above the ebullition point of water, an expansion which was hitherto possible only at temperatures above 200 C. because the pressure of steam is considerable at temperatures between 100 C. and 150 C. In orderto heat the cork in so short a time up to a temperature of from 100 C. upward, the heatmust be imparted to the cork particles very energetically. This may be done by using an atmosphere of very considerable temperature; for example the .cork' may be brought into a chamber of a temperature of 1000 C. and be removed again at once. In order that the cork is not carbonized or ignited it should be agitated; the more vigorous the agitation the better the result.
The cork may of course be heated up to the permissible maximum of about 400 C.
The cork thus expanded may be .used in known way to form cork stone with or without a cement, as loose fillingmaterial and the like. 7 l Now what I claim and desire to secure by Letters Patent is the following: a
l. A method to increase suddenly the volume of cork particles at temperatures above 100 C.' which consists in heating the cork suddenly to the said temperatures. I
2. A method to increase suddenly the volume of. cork particles at temperatures above 100 C. which consists in placing sufliciently moist corkparticles in a chamber previously highly heated and agitating the cork.
3. The method of expanding cork particles which consists in suddenly heating them toa temperature below 200 C.
That'I; claim. the foregoing as my invention, I have .signed'my name iii-presence of two witnesses, this seventh day. of June A. D.
MAX GRUNZWEIG. Witnesses CARL Mrsnn, C. INNans'BnowN.
US3736315A 1915-06-30 1915-06-30 Treatment of cork. Expired - Lifetime US1155057A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US3736315A US1155057A (en) 1915-06-30 1915-06-30 Treatment of cork.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US3736315A US1155057A (en) 1915-06-30 1915-06-30 Treatment of cork.

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US1155057A true US1155057A (en) 1915-09-28

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