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Publication numberUS600344 A
Publication typeGrant
Publication dateMar 8, 1898
Filing dateJun 25, 1897
Publication numberUS 600344 A, US 600344A, US-A-600344, US600344 A, US600344A
InventorsCharles W. Frost
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 600344 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

(No Model.)

0. W. FROST.


Patented Mar. 8, 1898.

In ve n to 1. %f%





SPECIFICATION forming part of Letters Patent No. 600,344, dated March 8, 1898.

Application filed June 25, 1897. Serial No. 642,216. (No model.)

To aZZ whom it may concern:

Be it known that 1, CHARLES W. FROST, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Yearly Calendars, of which the following is a specification, reference being had therein to the accompanying drawings.

My invention relates to yearly calendars; and the objects of my improvement are, first, to print the calendars upon a single piece of cardboard or paper that when folded for use will be selfsupporting upon a desk or table; second, to arrange the monthly calendars in such a way that when any particular month is being used it will be isolated from all of the other monthly calendars; and third, to provide a removable cover that can be used for advertising purposes and at the same time leave exposed to view the monthly calendars. To accomplish the desired result, I print the calendar upon a single piece of paper or cardboard that may' be folded in the form of a pyramid having four sides of equal dimensions, the months of the year being arranged in groups of three in such a manner that the monthly calendar in use will always stand upright in a position easily readable, while the other months are in such a position that they cannot be easily read.

In the accompanying drawings, Figure 1 shows a view of a yearly calendar printed on a piece of paper out to the form of an equilateral triangle, the dotted lines showing where the paper is to be scored and folded. Fig. 2 shows the calendar folded and ready for use. Fig. 3 is a front elevation of the cover made to fit over the folded-up calendar and conceal all but the one monthly calendar that is being used. Fig. 4 is a plan view of the calendar folded up and having the cover fitted thereon. Fig. 5 is a front elevation of the calendar and cover. Fig. 6 is a modification of Fig. 1, showing another form of cutting and scoring the paper so that it may be folded to form a pyramid having four equal sides.

A represents the paper or cardboard blank from which the calendars are formed. These blanks may be cut in the form of an equilateral triangle, as shown in Fig. 1, or in the form of a rhomboid, as shown in Fig. 6.

A A A are the spaces in which monthly calendars are printed, being preferably arranged in groups of three in the position shown.

a b c are the lines upon which the paper is scored and folded when the blank is cut in the shape shown in Fig. 1.

a b c d are the lines upon which the paper is scored and folded when the blank is cut in the shape shown in Fig. 6.

B is the cover for the calendars. This cover is out from a blank having one less side than the blank forming the calendar, but otherwise the same shape, and scored so as to fold in the same manner.

a I) c d is a rectangular opening cut in the bottom of one side of the cover in such a position that it will register with the monthly calendars A as they are brought into position from time to time.

The meeting edges of the cover B are pasted securely together, and the meeting edges of the calendar-blank may be secured together by a pasting-flap or in any other convenient manner; or, if desired, when used in conjunction with the cover B, the calendar may be folded in the shape shown in Fig. 2 and used without any fastening other than the cover. When the calendar is used in conjunction with the cover 13, the three blank sides of the cover may be used for advertising purposes. If the cover is not used, the blank spaces on the calendar may be utilized for advertisements.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is

1. A yearly calendar, having the monthly calendars arranged in groups of three, upon a pyramid having four surfaces of equal dimensions, each monthly calendar being printed between lines at right angles to the line that will form the base of an equilateral triangle when the calendar is brought into the proper position for reading, substantially as shown and described.

2. A yearly calendar having the monthly In testimony whereof I affix my signature in presence of two witnesses.




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US2797512 *Jan 30, 1956Jul 2, 1957Sieve Fredda F SDesk calendar
US4613391 *Sep 20, 1984Sep 23, 1986Graphics 3 Inc.Polyhedron assembling machine and method
US5752649 *Jan 8, 1997May 19, 1998Southpac Trust International, Inc.Self-erecting container with liner
US5878945 *Jan 27, 1998Mar 9, 1999Southpac Trust International, Inc.Self-erecting container
Cooperative ClassificationG09D3/02