Fig. 6. Old-Style Sales Book. Underwood Typewriter Co.
If the person who did the copying did not use due care, the paper would be too wet and the ink would run and blur the copy and the invoice. If two invoices were accidently picked up by the person copying, the top invoice would not be copied on the tissue sheet. This is a most serious objection, for the reason that the copy in the tissue was used as record of the invoice for the purpose of posting into the ledger.
Another difficulty was the usual one experienced through the use of bound books in office work. Only one person can use a book at one time. If Fayette Henry, the accountant, was using the tissue-copy book, and Dave Pike, the order clerk, wanted to use it to see if all invoices had been copied by the office boy, he had to wait on Fayette Henry. The loose-leaf sales sheet shown in Fig. 7, with the pages serially numbered and placed in proper binders after each sheet has been filed, overcomes all of the difficulties mentioned—with many additional benefits.
Fig. 7. Loose-Leaf Sales Sheet and Invoices. No Ruling on Sales Sheet. Remington Typewriter Co.
The loose-leaf sales sheet and invoice were first used with the flat-bed billing machine, the sales sheet being held in position by being placed over studs (round metal posts), which fitted into the punched holes in the edge of the paper. These punched holes were used ultimately for fitting over the metal binder posts in the loose-leaf binders. The invoices were wider than the regular-size invoice and were perforated about 1 inch or 1½ inches from the left side, as shown in Fig. 8. To the left of the perforated edge were two small holes about 2¾ inches apart, which fitted over two small studs on a sliding bill-holder device. This plan provided a means of holding the large sheet and invoice in proper relation to each other. A piece of carbon paper the same size as the sales sheet was placed between the invoice and the sales sheet. This ruling of the sales sheet is shown in Fig. 9.
Fig. 8. Invoice for Use on Billing Machine
When an invoice was written on the billing machine, it was manifolded on the sales sheet beneath. When the invoice was finished it was ready to mail—no delay in copying invoices, no blurred invoices through careless copying. No fading of the manifolded copy where black carbon paper was used. Inks are not made of indestructible carbons as black carbon paper is made. A condensed billing or invoicing loose-leaf sales book for this purpose is shown in Fig. 10.