US3528602A - Pocket sheet for loose-leaf binders - Google Patents

Description

p 15, 1970 J. R. RITCHIE 3,528,602

POCKET SHEET FOR LOOSE-LEAF BINDERS Filed Nov. 30, 1967 ATTORNEY John f2. Ez'fc/u'e.

United States Patent 3 528 602 POCKET SHEET FOR EOOSE-LEAF BINDERS John R. Ritchie, Milwaukee, Wis., assignor to Controlled Brands Food Institute, Inc., Chicago, 11]., a corporation of Illinois Filed Nov. 30, 1967, Ser. No. 687,054 Int. Cl. B65d 27/06 US. Cl. 229-68 '4 Claims ABSTRACT OF THE DISCLOSURE The invention relates to improvements in pocket sheets for loose-leaf binders and to the method of manufacture for the same.

Heretofore, pocket sheets of this general character have been manufactured from cut blanks in such a manner that when bound in a ring binder, access to the pocket therein is difiicult owing primarily to the fact that the opening to the pocket is disposed at an angle extending inwardly downwardly from the free edge to the bound edge. Further, such pocket sheets present an edge of single thickness for attachment to the binder, and, additionally, are difiicult to manufacture in existing automatic machines owing to the presence of an index tab on the free edge thereof. Also, because of the manner in which the pocket panel is secured to the main panel, the access opening to the pocket and the pocket capacity itself is substantially restricted.

In the herein disclosed structure, the pocket sheet which is formed from a pre-cut blank, has a double thickness throughout the length of its attachment edge, and, further, the pocket access opening is angled outwardly from the attachment edge, thus affording easy access to the interior of the pocket. Also, owing to the novel manner of assembly, the access opening to the pocket is substantially coincidental to the width of the pocket sheet and the pocket therefore has maximum capacity. Because of the specific structure giving rise to these advantages, it is possible to manufacture these pocket sheets by feeding the blanks through a conventional type of right-angle glueing machine, such as, for example, by use of an International Right-angle Gluer, manufactured by International Machine Co. Such machines embody means to successively perform the necessary folds in the blank and to turn a partially formed blank 90, so as to perform automatically all the steps of the forming, adhesive applying and sealing operations in continuous succession.

It is therefore an object of the invention to provide a pocket sheet of the character referred to.

Another object is to provide a pocket sheet having attachment perforations on a double ply edge.

Another object is to provide a pocket sheet of the character referred to having an angularly disposed access opening arranged with its lowermost edge terminating at the free edge of the pocket sheet.

Another object of the invention is to provide a pocket sheet of the character referred to wherein the pocket is disposed on the back side of the sheet.

Another object of the invention is to provide a pocket sheet having a pocket of maximum capacity.

Another object is to provide a novel method of assembling such pocket sheets from single blanks of sheet material.

Patented Sept. 15, 1970 The structure and means by which the above noted and other advantages and objects of the invention are attained will be described in the following specification, taken in conjunction with the accompanying drawings, showing a preferred illustrative embodiment of the invention, in which:

FIG. 1 is a plan view of a cut blank of foldable shape retaining sheet material.

FIG. 2 is a plan view of the back side of a finished pocket sheet.

FIG. 3 is a plan view of the front side of a finished pocket sheet.

FIG. 4 is a top end view of the pocket sheet.

FIG. 5 is a schematic view illustrating the successive steps taken in the glueing and assembling of the pocket sheet.

Referring now to the exemplary disclosure of the invention as shown in the accompanying drawings, the improved pocket sheet is for-med from a blank 11 of paperboard or like shape-retaining material suitably die cut and scored to provide a main or first panel 12 and a substantially triangular shaped pocket or second panel 13 hingedly connected to panel 12 on complemental longitudinal edges by a fold line 14 preferably generated by scoring. The other or free longitudinal edge of panel 12 has an integral index tab 12a that may be located at any desired position along the length thereof. One end of panel 12 carries a flap 15, connected thereto by a fold line 16, whereas the short free longitudinal edge of panel 13 carries a flap 17 connected thereto along fold line 18. The pocket panel 13 has one of its edges 19 curved gracefully from the end 18a of fold line 18 upwardly to the unflapped end edge 12b of panel 12. The side edges of flaps 15 and 17 may be tapered inwardly from their adjacent folds 16 and 18, respectively, as to permit the flaps to lie wholly within the plane of the surface of each adjacent panel 13 and 12, respectively, and bottom flap 15 may also be perforated to give added three ply strength at the fold 14 for mounting the pocket sheet in a ring binder.

In fabrication of the pocket sheet from such a blank, a series of such blanks are fed, one at a time, in a flat condition onto suitable conveyor means in a folding and glueing machine. This machine is not shown in the drawings, but FIG. 5 depicts the paths along which a stream of blanks advance through the machine and the various successive steps of the glueing and folding accomplished during their advance. As is well understood in the art, such a machine includes means like conveyors 21 and 22 for advancing the streams of blanks to successive stations where various operations are performed, as well as requisite belts, rollers and plows (not shown for performing such operations.

Viewing FIG. 5, the flat blank 11 is advanced through the machine in a flat condition on conveyor 21 to Station A, whereupon the flap 17 encounters a plow (see arrow p) that folds it over so that it lies flat on the top surface of the back panel 13. It then passes beneath an adhesive applying roller 23 (at Station B) which coats the upper surface of the folded flap 17 with a suitable adhesive. As the blank leaves Station B, the pocket or back panel 13 is folded over 180 along fold line 14 so as to lie fiat against the opposed surface of the front panel 12. This folding is illustrated by arrow Pa, at Station C. Pressure is then applied, as by belts or rollers (not shown) to insure adhesion of flap 17 to the front panel surface.

The partially assembled pocket sheet is then carried from Station C onto conveyor 22 moving in the same plane as but in a direction at right angles to the first named conveyor 21. The flap 15 is now coated with a ice layer of adhesive applied thereto by a roller 24 at Station D, following which the adhesive coated flap 15 is plowed over or otherwise folded (see arrow Pb) along fold line 16 so as to overlay the top surface of pocket panel 13. The complete assembly then is pressed by means of suitable belts, rollers, or platens (not shown) for a period of time sufficient to insure adhesion of the adhesive joints.

After forming, a series of perforations 25 are preformed adjacent to the fold 14, as by drilling, so as to provide apertures for threading onto the rings of a conventional ring binder (not shown).

Both the front and back surfaces of the completed pock-' et sheet may bear any desired printing material.

It should be apparent that owing to the manner of assembly, the access opening to the pocket, along curved edge 19, is co-extensive with the width of the pocket sheet and access thereinto for insertion and withdrawal of the contents may be easily accomplished. As shown in FIG. 4, the pocket formed therein has a width substantially equal to the width of the pocket sheet.

Although I have described a preferred embodiment of my invention in considerable detail, it will be understood that the description thereof is intended to be illustrative rather than restrictive, as details of the structure and the steps of the method may be modified or changed without departing from the spirit or scope of the invention. Accordingly, I do not desire to be restricted to the exact construction shown and described.

I claim:

1. A one piece pocket sheet for loose leaf binders comprising a substantially rectangular first panel, a second panel of substantially the same width as the first panel and having parallel side edges, one of said second panel side edges being co-extensive with a side edge of the first panel and the other second panel side edge being partially co-extensive 'with a side edge of the first panel, a fold integrally joining said first co-extensive side edges and said panels being folded along said fold to lie one over the other surface to surface, a first flap integrally connected by a fold to said second side edge of the second panel, said fiap lying between the first and second panels and adhesively secured to the opposed surface of the first panel, a second flap on one end edge of the first panel overlying and adhesively secured to the outside surface of the second panel, and perforations adjacent said fold for mounting said pocket sheet in a loose leaf binder.

2. The pocket sheet recited in claim 1, in which the side edge of the first panel remote from said fold has an integral index tab protruding therefrom.

3. The pocket sheet recited in claim 1, in which the side edges of each of the flaps are tapered inwardly from the panel adjacent thereto as to lie wholly Within the plane of the surface of said adjacent panel.

4. The pocket sheet recited in claim 1, in which the second flap is also perforated.

References Cited UNITED STATES PATENTS 671,968 4/1901 Kittredge 229-68 1,860,965 5/1932 Stone 229--68 2,091,667 8/1937 Barnes 22968 DAVID M. BOCKENEK, Primary Examiner US. Cl. X.R. 22972

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