The walls of the Mersey Tunnel equal nearly 20 acres in area, and the engineers think the walls will have to be cleaned once a month. This need has led to the creation of a new kind of cleaning machine. Two spindles revolving quickly ir opposite directions have mounted on them strips of material which fly outward by centrifugal force, and as they wipe the walls of the tunnel with tremendous speed, water containing a cleansjng medium is pumped on to the revolving stripe. The cleaning machine is mounted on a carriage which travels at the rate of about six feet a minute.
Permanent link to this item
https://paperspast.natlib.govt.nz/newspapers/ODT19340728.2.14.6
Bibliographic details
Otago Daily Times, Issue 22326, 28 July 1934, Page 4
Word Count
103Page 4 Advertisements Column 6 Otago Daily Times, Issue 22326, 28 July 1934, Page 4
Using This Item
Allied Press Ltd is the copyright owner for the Otago Daily Times. You can reproduce in-copyright material from this newspaper for non-commercial use under a Creative Commons New Zealand BY-NC-SA licence. This newspaper is not available for commercial use without the consent of Allied Press Ltd. For advice on reproduction of out-of-copyright material from this newspaper, please refer to the Copyright guide.