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
Application number
GB2816130A
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.)
WILLARD JOHN MASON
Original Assignee
WILLARD JOHN MASON
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 WILLARD JOHN MASONfiledCriticalWILLARD JOHN MASON
Priority to GB2816130ApriorityCriticalpatent/GB352815A/en
Publication of GB352815ApublicationCriticalpatent/GB352815A/en
352,815. Roofing. CUMFER, H. A., 4451, Fillmore Street, and MASON, W. J., 228, North La Salle Street, both in Chicago, U.S.A. Sept. 20, 1930, No. 28161. [Class 20 (iv).] A flexible felted fibrous sheet for covering roofs and walls is expanded and apertures are formed therein by making slits 5 and applying pressure by ribbed rolls 9 to the parts 10<1> immediately adjacent to the slits, thus forming slots 11. The slits may open at the edge, and the sheets may be cut into strips, Fig. 6.
GB2816130A1930-09-201930-09-20Manufacture of expanded fibrous sheet material
ExpiredGB352815A
(en)