US997275A - Process of treating wood for pencils. - Google Patents
Process of treating wood for pencils. Download PDFInfo
- Publication number
- US997275A US997275A US47435109A US1909474351A US997275A US 997275 A US997275 A US 997275A US 47435109 A US47435109 A US 47435109A US 1909474351 A US1909474351 A US 1909474351A US 997275 A US997275 A US 997275A
- Authority
- US
- United States
- Prior art keywords
- wood
- pencils
- slats
- wax
- vessel
- 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
Links
- 239000002023 wood Substances 0.000 title description 24
- 238000000034 method Methods 0.000 title description 8
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 12
- 239000000463 material Substances 0.000 description 11
- 239000001993 wax Substances 0.000 description 8
- 239000007788 liquid Substances 0.000 description 6
- 230000001105 regulatory effect Effects 0.000 description 6
- 229940032330 sulfuric acid Drugs 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000009835 boiling Methods 0.000 description 5
- 238000005520 cutting process Methods 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 241000219495 Betulaceae Species 0.000 description 1
- 241001070941 Castanea Species 0.000 description 1
- 235000014036 Castanea Nutrition 0.000 description 1
- 241000218645 Cedrus Species 0.000 description 1
- 241000721662 Juniperus Species 0.000 description 1
- 235000014556 Juniperus scopulorum Nutrition 0.000 description 1
- 235000014560 Juniperus virginiana var silicicola Nutrition 0.000 description 1
- 241000219071 Malvaceae Species 0.000 description 1
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 235000008691 Sabina virginiana Nutrition 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 235000001520 savin Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/52—Impregnating agents containing mixtures of inorganic and organic compounds
Definitions
- This invention relates/to the class of pencllsof that'class in Whichthe leads are surrounded by woodenfholders which are cut away ⁇ fromrtime to time to. expose fresh portions of the leads toreplace those which have been worn off by use, and the object of this invention is to provide wood for lead pencils of-this particular class which may be easily cut or sharpened s
- the principal features 1 of the invention consist in the chemical preparation or treatpencil leads by partial decomposition of the -wood by liquid either in a closedv vessel or ment of the wood for the wooden holders of contained by a vessel. open to the atmosphere, and depositing apore.
- the object of my invention is to obtain by the treatment of compara- 'tively cheap and common wood the easy cutting quality and color required for a pencil wood which may be used as a substitute for the red cedar now almost universally used for lead pencils.
- a suitable wood such as for example alder or bass wood
- a decomposing liquid. 4 consisting of water contalning about one per cent. of commercial sulfuric acid is then poured into the vessel to cover the slats and heat is applied and the slats are boiled for about one half hour or until a reddish tint o-r cedar color 18 produced; when the liquid is withdrawn Without removing the slats and the vessel is refilled with paraffin wax preferably in a molten state. Heat is again applied to raise thetemperature of the wax to a little over the boiling point of water and preferably to.
- the gage indicates the quantity of wax going into ;the slats. as c the water evaporates.
- the amount of wax enterlng the wood can be regulated and controlled which is an essential feature-of my invention as complete saturation-of the wood with wax renders theslats unsuitable for gluing and con sequently unsuitable for pencil making; hen; the required quantity ofwax hasbeen absorbedby the slats the liquidwax is withdrawn from the vessel.
- the slats are then dried in a temperature higher than the melt' reddish color when boiled in dilute sulfuric 1 acid, There-are some woods which do not develop the required color when so treated, as chestnut and some pine woods and I do not employ these, but I do not restrict myself to the woods before named nor to the use of paraflin wax as I may use any equivalent pore filling material which improves the cutting qualities of thewood.
- a process for treating wood for holders of lead pencils consisting in immersing it in hot dilute sulfuric acid until a reddish tint is produced and afterward impregnating the same with a regulated quantity of waxy material which shall improve the cut-- ting qualities of the wood, substantially as described.
- a process for treating wood for use in pencils consisting in immersing it in a solution of about one percent. sulfuric acid, boiling until a-reddish tint is produced and then impregnating the wood with a regulated quantity of waxy material which shall pencils, consisting in immersing it in a solut1on of sulfuric acid, bOlllIlg until a reddish tint is produced, impregnatlng the wood with a regulated quantity of waxy material at a temperature sli htly above the boiling point of water, and withdrawing the remainder of the said material.
- a process for treating wood for use in pencils consisting in immersing it in a solution of sulfuric acid, boiling until. a reddish tint is produced, impregnating the wood with a regulated quantity of waxy material at a temperature slightly above the boiling point of Water, withdrawing the remainder of the said material, and drying the wood at a temperature above the melting point of the said material.
- a process for treating wood for use in pencils consisting in immersing it in hot dilute sulfuricacid until a reddish tint is produced and afterward impregnating the same with a regulated quantity of liquid parafiin, substantially as described.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Description
UNITED STATES PATENT oF i "PROCESS F",TREATING woon son 'rnivoirs- T011511, whom it may concern:
Be- ;itknown j'that I, SAMUEL IInmiY CRooKEn, a subject of the King ofGleat- Britainandllreland,residing at 9 St; James Walk, in the county of London, England, ha-veanvented a.,certa1n. new and useful Process of Treating: 00d vfor Pencils, of
which. the following is a specification. This invention relates/to the class of pencllsof that'class in Whichthe leads are surrounded by woodenfholders which are cut away} fromrtime to time to. expose fresh portions of the leads toreplace those which have been worn off by use, and the object of this invention is to provide wood for lead pencils of-this particular class which may be easily cut or sharpened s The principal features 1 of the invention consist in the chemical preparation or treatpencil leads by partial decomposition of the -wood by liquid either in a closedv vessel or ment of the wood for the wooden holders of contained by a vessel. open to the atmosphere, and depositing apore. filling material in the wood; and combining the wooden holders made from the wood so treated with I pencil leads, and the object of my invention is to obtain by the treatment of compara- 'tively cheap and common wood the easy cutting quality and color required for a pencil wood which may be used as a substitute for the red cedar now almost universally used for lead pencils.
In carrying out my invention in one con venient manner a suitable wood, such as for example alder or bass wood, is cut up into pencil slats and placed in a suitable vessel. A decomposing liquid. 4 consisting of water contalning about one per cent. of commercial sulfuric acid is then poured into the vessel to cover the slats and heat is applied and the slats are boiled for about one half hour or until a reddish tint o-r cedar color 18 produced; when the liquid is withdrawn Without removing the slats and the vessel is refilled with paraffin wax preferably in a molten state. Heat is again applied to raise thetemperature of the wax to a little over the boiling point of water and preferably to.
about 214 Fah. at which temperature it is maintained until sufficient water has been removed from the slats by evaporation to I allow the wood to absorb a certain quantity of wax. The vessel containing the slats and the liquid is provided with a liquid gage Specification of Letters Patent. .i Application filed lanuary26,1909. Seria1 Nd. 47
and the gradual descent of the wax levelin Patented July 11,1911.
the gage indicates the quantity of wax going into ;the slats. as c the water evaporates. Thus the amount of wax enterlng the wood can be regulated and controlled which is an essential feature-of my invention as complete saturation-of the wood with wax renders theslats unsuitable for gluing and con sequently unsuitable for pencil making; hen; the required quantity ofwax hasbeen absorbedby the slats the liquidwax is withdrawn from the vessel. The slats are then dried in a temperature higher than the melt' reddish color when boiled in dilute sulfuric 1 acid, There-are some woods which do not develop the required color when so treated, as chestnut and some pine woods and I do not employ these, but I do not restrict myself to the woods before named nor to the use of paraflin wax as I may use any equivalent pore filling material which improves the cutting qualities of thewood.
It is evident that modifications may be made within the scope of the invention. F or example the slats may be treated in a closed vessel and the treatment carried out.
under pressure.
' The slats from which ordinary pencils are mostly made and which itis intended to treat by this process average in size about? inches long by 2:} inches wide by f ths of an inch thick as it will be. understood that these slats vary in length, width and thickness in. accordance with the size of the pencil to be manufactured and they may be very much smaller and again very much larger. Different woods will absorb varying amounts of paraflin wax or other pore filling material before reaching saturation and various pen- .cils may require different degrees of hardness or softness in the texture of the wood according as a hard lead or a soft lead may be embedded in the wood and to obtain this result a greater or less proportion of the pore filling material is absorbed by the wood. I claim: l. A process for treating wood for holders of lead pencils consisting in immersing it in hot dilute sulfuric acid until a reddish tint is produced and afterward impregnating the same with a regulated quantity of waxy material which shall improve the cut-- ting qualities of the wood, substantially as described.
.2. A process for treating wood for use in pencils, consisting in immersing it in a solution of about one percent. sulfuric acid, boiling until a-reddish tint is produced and then impregnating the wood with a regulated quantity of waxy material which shall pencils, consisting in immersing it in a solut1on of sulfuric acid, bOlllIlg until a reddish tint is produced, impregnatlng the wood with a regulated quantity of waxy material at a temperature sli htly above the boiling point of water, and withdrawing the remainder of the said material. V
5. A process for treating wood for use in pencils, consisting in immersing it in a solution of sulfuric acid, boiling until. a reddish tint is produced, impregnating the wood with a regulated quantity of waxy material at a temperature slightly above the boiling point of Water, withdrawing the remainder of the said material, and drying the wood at a temperature above the melting point of the said material.
6. A process for treating wood for use in pencils, consisting in immersing it in hot dilute sulfuricacid until a reddish tint is produced and afterward impregnating the same with a regulated quantity of liquid parafiin, substantially as described.
In witness whereof I have hereunto set my hand in the presence of two witnesses.
SAMUEL HY. CROCKER.
. Witnessesr JNo. H. RYAN,
FRANK W. PATTISQN.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US47435109A US997275A (en) | 1909-01-26 | 1909-01-26 | Process of treating wood for pencils. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US47435109A US997275A (en) | 1909-01-26 | 1909-01-26 | Process of treating wood for pencils. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US997275A true US997275A (en) | 1911-07-11 |
Family
ID=3065606
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US47435109A Expired - Lifetime US997275A (en) | 1909-01-26 | 1909-01-26 | Process of treating wood for pencils. |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US997275A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2907684A (en) * | 1954-04-29 | 1959-10-06 | Dow Chemical Co | Method of impregnating wood with paraffin wax and with polyethylene glycol to improve its cutting qualities |
-
1909
- 1909-01-26 US US47435109A patent/US997275A/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2907684A (en) * | 1954-04-29 | 1959-10-06 | Dow Chemical Co | Method of impregnating wood with paraffin wax and with polyethylene glycol to improve its cutting qualities |
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