File:Bell telephone magazine (1922) (14569987750).jpg

Identifier: belltelephonemag19amerrich (find matches)
Title: Bell telephone magazine
Year: 1922 (1920s)
Authors: American Telephone and Telegraph Company American Telephone and Telegraph Company. Information Dept
Subjects: Telephone
Publisher: (New York, American Telephone and Telegraph Co., etc.)
Contributing Library: Prelinger Library
Digitizing Sponsor: Internet Archive

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
quantity of paper composedprincipally of ground wood is em-ployed in the Bell System for ticketsto record telephone calls, the con-sumption exceeding a million and aquarter pounds annually. Chemical pulps are of three classes:sulphite, sulphate, and soda, the lattermanufactured from deciduous woods,: such as poplar and birch. Papersmade from sulphite pulp comprise theI great majority of business stationery.It produces a paper of good appear-ance and wearing qualities at moder-ate cost. Sulphate pulp makes ourbrown wrapping paper. It is astronger fibre than sulphite and ismoderate in cost, but because of thebrown color its use for business pa-pers is largely confined to envelopesand file folders. Soda pulp is em-ployed only in combination withothers. It has little strength but isopaque and finds use where papershaving bulk and opacity are required.It is commonly found in combinationwith sulphite pulp in envelope stocks.Rag pulp produces papers of thehighest grade. They have the great-
Text Appearing After Image:
est strength and resistance to erasure,but are also the most costly. Ragpapers are employed for permanentrecords, ledgers, and other purposesrequiring maximum durability andappearance. The usual combinations of pulpsare: ground wood and sulphite;ground wood, sulphite, and soda; sul-phite and soda; sulphite and rag.The finished paper bears the charac-teristic of the pulps of which it is com-posed in ratio to the proportions used. Establishing a Standard Range Upon completion by the A. T. andT. engineers of their review of themanufacturing and technical aspectsof the standardization job, the papersin use by the Associated Companieswere analyzed for pulp composition,and were tested for strength and otherphysical characteristics in so far asthe limited equipment available at thattime permitted. The result of all thiswork was a thorough acquaintancewith both the technology of the avail-able grades of business papers andwith the kinds of papers required bythe telephone companies. 144 Bell T

Note About Images