US3499634A - Combustible support - Google Patents

Combustible support Download PDF

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Publication number
US3499634A
US3499634A US705350A US3499634DA US3499634A US 3499634 A US3499634 A US 3499634A US 705350 A US705350 A US 705350A US 3499634D A US3499634D A US 3499634DA US 3499634 A US3499634 A US 3499634A
Authority
US
United States
Prior art keywords
articles
cups
support
sagger
upright
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
Application number
US705350A
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English (en)
Inventor
Robert F Rea
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.)
Federal Mogul Ignition LLC
Original Assignee
Champion Spark Plug Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Champion Spark Plug Co filed Critical Champion Spark Plug Co
Application granted granted Critical
Publication of US3499634A publication Critical patent/US3499634A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D5/00—Supports, screens or the like for the charge within the furnace
    • F27D5/005—Supports specially adapted for holding elongated articles in an upright position, e.g. sparking plugs
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24628—Nonplanar uniform thickness material
    • Y10T428/24661—Forming, or cooperating to form cells

Definitions

  • a combustible support for holding elongated articles upright in a sagger prior to firing the articles in a kiln.
  • the support comprises a single, thin sheet of synthetic resinous material with a number of cups formed therein.
  • the cups are shaped and spaced to receive and to hold the articles in an upright, laterally spaced position.
  • This invention relates generally to a support for holding elongated articles in an upright position in a sagger and particularly to a combustible support for holding the articles upright while several saggers are stacked and moved into a kiln.
  • the tray or support of the present invention is preferably a single thin sheet of a combustible synthetic resinous material with a plurality of cups formed therein.
  • the cups may be vacuum formed, or formed in an injection molder or other processor.
  • the cups are shaped to receive elongated articles in an upright position.
  • the center-tocenter spacing of the cups is slightly larger than, e.g., a few thousandths of an inch, the maximum diameter of the articles. This allows the articles to expand during firing without being distorted.
  • Another object of the present invention is to provide an inexpensive support for holding elongated articles in an upright and laterally spaced position in a sagger prior to firing in a kiln.
  • Still anothter object of the present invention is to provide a support for holding articles in an upright position in a sagger prior to firing in a kiln, but which will burn completely during firing and thus permit the articles to expand without being distorted.
  • FIG. 1 is a top plan view showing a combustible support of the present invention
  • FIG. 2 is an enlarged cross-sectional view taken along line 22 of FIG. 1 showing the formed cups in detail;
  • FIG. 3 is a side elevation of a portion of the support showing elongated articles positioned in the cups; and
  • FIG. 4 is a cross-sectional side view of two stacked saggers, each holding a support and articles.
  • the tray or support 10 comprises a single fiat sheet 12 of combustible material having a plurality of spaced cups 14 formed therein.
  • the sheet 12 is made from a material which will burn easily and leave at most a trace of ash.
  • the material is a synthetic resin, e.g., a low ash, non-filled, unoriented butyrate, polystyrene or polyethylene; however, other combustible materials such as cellulosic sheets will work.
  • the material should be just thick enough to have the necessary strength to support the articles.
  • FIGS. 2 and 3 Construction of the cups 14 is shown in detail in FIGS. 2 and 3.
  • the support 10 When the support 10 is manufactured from a flat sheet of material 12, cups 14 can be vacuum formed or pressed into the sheet; where the support 10 is manufactured from raw material, it can be injection molded.
  • the vacuum forming process will normally cause the sides 16 to be tapered toward the bottom 18 0f the cups 14 and will cause the bottoms 18 of the cups to be very thin.
  • the use of a plug assist as the cups are vacuum formed will produce a more uniform thickness in the walls and the bottoms of the cups 14. This may be necessary to give the support adequate strength.
  • the sides 16 of the cups 14 serve primarily to support the sheet 12 above the horizontal sagger bottom 20 and secondarily to hold the articles 22 straight in the cups 14.
  • the bottoms 18 of the cups 14 serve no useful purpose and may therefore be very thin. As shown in FIG. 3, the weight of the articles 22 will flatten or collapse the thin bottoms 18 of the cups 14. If the sheet 12 and the cup sides 16 burn away before the cup bottoms 18 burn away, the thin, collapsed bottoms 18 are not enough to cause the articles 22 to tilt or fall.
  • the combustible support 10 can be designed to hold any small elongated articles 22 which are to be fired in a kiln, such as spark plug insulators as shown in FIG. 3.
  • the cups 14 are shaped to receive the upright articles 22.
  • the center-to-cente-r spacing of the cups 14 is slightly greater than the maximum diameter A of the articles 22 (see FIG. 3). Consequently, the articles 22 are separated and held upright by the support 10.
  • the sheets 12 of the combustible supports 10 have overall dimensions slightly smaller than the interior dimensions of the saggers. This facilitates insertion into the sagger, but movement of the supports 10 within the saggers is minimized. Since the supports 10 are preferably of thin synthetic resinous material, they will not support the full weight of the articles and are, therefore, inserted into the saggers prior to loading of the articles 22 thereinto. However, the support can be constructed thick enough to act as a tray and, in that instance, can be filled before it is placed in the sagger.
  • a sheet of synthetic resinous material about 0.01 inch thick and about 13 /5 inches square is vacuum formed with an 18 by 18 grid of spaced holes inch in diameter to receive green spark plug insulators.
  • the material selected should produce less than 0.02% ash when burned'to prevent discoloration of the insulators.
  • the support is then placed in a sagger having interior dimensions of about 13 /2 3 inches square and 4 inches high and a wall thickness of /8 inch. Six to nine saggers are filled with green spark plug insulators and stacked. The stack is then covered and conveyed through a kiln for firing.
  • the support comprises a single flat sheet of combustible material having holes cut into it adapted to receive the upright articles.
  • the sides of cooperating saggers are notched or grooved to hold the support at a predetermined height above the bottom of the sagger.
  • the method of loading a plurality of elongated articles to be fired in a kiln into a sagger having a generally horizontal bottom, such that the articles are held upright and laterally spaced comprising the steps of:
  • a generally planar combustible spacer having a plurality of cups adapted to receive and to hold the upright articles, said cups having sides for holding said spacer in a generally horizontal position at a level spaced a selected distance above the bottom of the sagger, and said cups having a center-to-center spacing greater than the maximum lateral dimension of the upright articles, and placing the articles in an upright position in said cups.
  • said spacer is fabricated from a thin sheet of a combustible synthetic resin-.
  • a generally planar combustible spacer having a plurality of cups adapted to receive and to hold the upright articles, said cups having sides for holding said spacer in a generally horizontal position at a level spaced a selected distance above the bottom of the sagger, and said cups having a center-to-center spacing greater than the maximum lateral dimension of the upright articles, and
  • a support for holding a plurality of elongated articles to be fired in a kiln in laterally spaced, upright position in a sagger having a generally horizontal bottom comprising: a generally planar spacer fabricated from a thin sheet of combustible synthetic resinous material, said spacer having a plurality of cups formed therein to receive the articles, said cups having rigid sides for holding said spacer in a generally horizontal position at a level spaced a selected distance above the bottom of the sagger and thin collapsible bottoms which do not prevent the articles to stand upright in the sagger when said spacer and said rigid sides burn away, and the center-to-center spacing of said cups being greater than the maximum lateral dimension of the upright articles.
  • a generally planar combustible support having a plurality of cups formed therein and shaped to receive one end of each of the insulators for holding the insulator in an upright position, said cups having sides for holding said support in a generally horizontal position at a level spaced a selected distance above the bottom of the sagger, and
  • said cups having a center-to-center spacing greater than the diameter of the flange portion of the insulators, and placing the insulators in an upright position in said cups.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Charging Or Discharging (AREA)
US705350A 1968-02-14 1968-02-14 Combustible support Expired - Lifetime US3499634A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US70535068A 1968-02-14 1968-02-14

Publications (1)

Publication Number Publication Date
US3499634A true US3499634A (en) 1970-03-10

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US705350A Expired - Lifetime US3499634A (en) 1968-02-14 1968-02-14 Combustible support

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US (1) US3499634A (en))
BE (1) BE727617A (en))
GB (1) GB1206576A (en))

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3633892A (en) * 1970-01-29 1972-01-11 Holley Plastics Co Plastic tray structure and method of production
US3704871A (en) * 1970-07-13 1972-12-05 Hayes Inc C I Apparatus for heat treating metallic articles
US3778224A (en) * 1971-03-16 1973-12-11 Bosch Gmbh Robert Jig for firing of ceramic spark plug insulation
US4756959A (en) * 1986-02-20 1988-07-12 Ishizuka Garasu Kabushiki Kaisha Sheet for use in firing base plates
US6126887A (en) * 1999-07-30 2000-10-03 General Electric Company Method of manufacture of ceramic ARC tubes
US6426027B1 (en) * 2000-05-17 2002-07-30 Neptune Technology Group, Inc. Method of injection molding for creating a fluid meter housing
US20170248367A1 (en) * 2016-02-26 2017-08-31 Mitsui High-Tec, Inc. Tray and heat treatment method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10315354A1 (de) 2003-04-03 2004-10-28 Otto Junker Gmbh Glühgestell

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3014614A (en) * 1958-07-09 1961-12-26 Alfred J Carroll Disposable mold
US3179724A (en) * 1963-06-07 1965-04-20 Olean Tile Company Method of firing ceramic articles

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3014614A (en) * 1958-07-09 1961-12-26 Alfred J Carroll Disposable mold
US3179724A (en) * 1963-06-07 1965-04-20 Olean Tile Company Method of firing ceramic articles

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3633892A (en) * 1970-01-29 1972-01-11 Holley Plastics Co Plastic tray structure and method of production
US3704871A (en) * 1970-07-13 1972-12-05 Hayes Inc C I Apparatus for heat treating metallic articles
US3778224A (en) * 1971-03-16 1973-12-11 Bosch Gmbh Robert Jig for firing of ceramic spark plug insulation
US4756959A (en) * 1986-02-20 1988-07-12 Ishizuka Garasu Kabushiki Kaisha Sheet for use in firing base plates
US6126887A (en) * 1999-07-30 2000-10-03 General Electric Company Method of manufacture of ceramic ARC tubes
US6426027B1 (en) * 2000-05-17 2002-07-30 Neptune Technology Group, Inc. Method of injection molding for creating a fluid meter housing
US20170248367A1 (en) * 2016-02-26 2017-08-31 Mitsui High-Tec, Inc. Tray and heat treatment method
US10365042B2 (en) * 2016-02-26 2019-07-30 Mitsui High-Tec, Inc. Tray and heat treatment method

Also Published As

Publication number Publication date
BE727617A (en)) 1969-07-01
GB1206576A (en) 1970-09-23

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