Heating – Accessory means for holding – shielding or supporting work... – Support structure for heat treating ceramics
Patent
1993-04-06
1995-02-28
Tapolcai, William E.
Heating
Accessory means for holding, shielding or supporting work...
Support structure for heat treating ceramics
211 41, F27D 500
Patent
active
053932269
DESCRIPTION:
BRIEF SUMMARY
This invention relates to ware support apparatus and particularly but not exclusively to apparatus for supporting glazed flatware during firing by either conventional or fast firing processes.
The term `pin` when used in this specification is hereinafter to be understood as referring to a short length of a ceramic material which is detachably mountable in kiln furniture to support ware thereon during firing. Pins are typically made of, or have a high content of, alumina or a similar refractory material. Pins are usually in the order of 25 mm long, and have a triangular cross-section such that ware is supported on an apex of the pin. Pins are normally used for only one firing.
A problem encountered with existing kiln furniture is that much of it requires dismantling during loading and unloading. Alternatively, or in addition, the furniture has tended to have a relatively large mass in relation to the ware being fired and thus consumes a considerable amount of heat. Vitreous ware, such as fine bone china, is generally supported during firing at the unglazed foot rather than the rim, to eliminate `placing marks` on the rim.
Conventional furniture providing foot support has tended to have both of the above mentioned disadvantages. Further, with products suited to fast firing techniques problems have been encountered with thermal shocking of kiln furniture with a relatively large mass of solid material.
A feature with flatware is that the distance between the rim and foot is substantially constant irrespective of the size of the ware.
According to the present invention there is provided ware support apparatus comprising a base having three limbs extending away from a common meeting point, a top cover of a corresponding shape, three uprights mountable between the cover and base each extending from a one of the limbs, and means provided on the uprights to detachably mount a plurality of ware support members in a spaced relationship whereby to support a plurality of articles of ware, the ware support members being mountable so as to be able to provide support spaced from the limbs whereby to support the articles of ware beneath the feet thereof.
The ware support members are preferably mountable spaced from the limbs the ware support members being mountable so as to be able to provide support spaced from the limbs whereby to support the articles of ware beneath the feet thereof.
The ware support members are preferably mountable spaced from the limbs.
The ware support members may comprise pins, or alternatively sleeves which fit over the mounting means.
The base and cover may have a generally `T` shaped configuration, or may alternatively have a generally `Y` shaped configuration.
Support member mounting means may also be provided on the base.
The uprights preferably locate in holes in the cover and base, the holes desirably being located adjacent the wet free ends of the limbs. Passages and/or openings are preferably provided through the cover and/or base whereby to prevent thermal shock occurring therein.
The support member mounting means may comprise a plurality of spaced limbs provided on each of the uprights extending substantially perpendicularly to the longitudinal direction thereof.
A groove may be provided on an upper surface of the spaced limbs to locate a pin thereon and a further groove may be provided on the lower surface giving a reversible component.
The spaced limbs may be removably mountable on the uprights, which may be by virtue of a sleeve on the spaced limbs in which is located the uprights. The sleeves on the spaced limbs are preferably shaped to provide the required spacing. As an alternative spacer sleeve members may be provided to locate between adjacent spaced limbs on an upright to provide the required vertical spacing.
Alternatively the spaced limbs may locate in transverse openings in the uprights which may extend fully through the uprights. A head may be provided on the spaced limbs engagable with an outer side of the uprights.
Embodiments of the present invention will now be described
REFERENCES:
patent: 1084980 (1931-05-01), Hardesty
patent: 3681817 (1972-08-01), Lovatt
patent: 4184841 (1980-01-01), Robinson et al.
patent: 4504224 (1985-03-01), Hewitt
patent: 4636170 (1987-01-01), Stupka
patent: 4872554 (1989-10-01), Quernemoen
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