From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Proposing a test of a puncture seal product called 'Impervo'.
| Identifier | ExFiles\Box 77\4\ scan0123 | |
| Date | 29th July 1922 | |
| X4542 PN{Mr Northey}5/DN/29.7.22. TO Hs.{Lord Ernest Hives - Chair} FROM PN.{Mr Northey} Some friends of mine are interested in the Puncture Seal called Impervo", particulars of which are enclosed herewith. For many years one has met puncture seals of sorts, but there really would appear to be some qualities in the special material referred to. I think if you have not already made tests of this, it would be extremely useful for us to have first-hand information as to the effectiveness or otherwise. If you will let me know, I can arrange for a sample amount to be sent to you without charge, in order that your test can be made. PN.{Mr Northey} | ||