GB748187A - Improvements in or relating to supporting pads for vacuum flasks - Google Patents
Improvements in or relating to supporting pads for vacuum flasksInfo
- Publication number
- GB748187A GB748187A GB2217653A GB2217653A GB748187A GB 748187 A GB748187 A GB 748187A GB 2217653 A GB2217653 A GB 2217653A GB 2217653 A GB2217653 A GB 2217653A GB 748187 A GB748187 A GB 748187A
- Authority
- GB
- United Kingdom
- Prior art keywords
- fibres
- plate
- drying
- silvering
- mould
- 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
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B23/00—Re-forming shaped glass
- C03B23/04—Re-forming tubes or rods
- C03B23/13—Reshaping combined with uniting or heat sealing, e.g. for making vacuum bottles
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
A resilient supporting pad positioned between the inner and outer glass walls of a vacuum flask is made by (i) washing in distilled water short heat-resistant fibres having a low heat conductivity and chemically inert to the silvering of the glass (ii) partially drying the washed fibres to remove therefrom approximately 90 per cent of the distilled water absorbed thereby (iii) filling and pressing the partially dried fibres into a mould having the shape of a pad and (iv) completing the drying of the fibres in the mould. Suitable fibres are asbestos, purified by normal methods, 1/16 in. to 1/8 in. long. The partial drying is done in an open topped tank with a perforated plate spaced above the bottom and covered with a cloth on which the wet fibres are spread. A vacuum pump connected to the space below the plate is operated and moisture is drawn from the wet fibres through the cloth. The moulds are formed by holes of the required diameter extending through a metal plate of the required thickness, lying on a flat surface. The material of the plate should not impart to the pads any particles which might have an undesirable chemical reaction with the heated glass or silvering, suitable materials being aluminium alloy and stainless steel. With about 90 per cent of the water removed, the fibres have the consistency of putty and are filled and pressed into the holes by means of a trowel resembling a brick-layer's. When the moulds are filled the plate is put in an oven to complete the drying of the fibres, or it may be left to the atmosphere. The completed pads can be removed from the mould plate, which is held over a receptacle, by gentle tapping. The washing and partial drying may be omitted if the fibres are sufficiently pure, the fibres merely being wetted to the required consistency. Distilled water is not essential if the water used is free from soluble or other substance which would cause the fibres treated therewith to react with the silvering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2217653A GB748187A (en) | 1953-08-11 | 1953-08-11 | Improvements in or relating to supporting pads for vacuum flasks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2217653A GB748187A (en) | 1953-08-11 | 1953-08-11 | Improvements in or relating to supporting pads for vacuum flasks |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB748187A true GB748187A (en) | 1956-04-25 |
Family
ID=10175189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2217653A Expired GB748187A (en) | 1953-08-11 | 1953-08-11 | Improvements in or relating to supporting pads for vacuum flasks |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB748187A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1099095B (en) * | 1958-07-17 | 1961-02-09 | Siemens Reiniger Werke Ag | Rotating anode X-ray tube |
-
1953
- 1953-08-11 GB GB2217653A patent/GB748187A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1099095B (en) * | 1958-07-17 | 1961-02-09 | Siemens Reiniger Werke Ag | Rotating anode X-ray tube |
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