US 2780262 A
Description (OCR text may contain errors)
Feb. 5, 1957 w. LENNARTZ I COVERING OF ARTIFICIAL MATERIAL Filed June 25, 1953 INVENTOR. [VAL 75/? Af/V/VA/f 7' Z M77 2%;
COVERING F ARTIFICIAL MATERIAL Walter Lennartz, Dachau, near Munich, Germany Application June 25, 1953, Serial No. 364,168
Claims priority, application Germany June 30, 1952 2 Claims. (Cl. 150-39) The present invention relates to a file cover made of artificial material for use in holding documents, records, etc., and is particularly directed to a file cover provided with simple and reliable means for securing it in closed condition.
According to the invention the cover consists of an upper covering sheet and of a lower covering sheet which may be joined to each other at either two contiguous peripheral edges, or at merely one edge, like an ordinary file cover.
The invention resides in the feature that one of the covering sheets is provided at either one free corner, or at two free corners with a pocket of the same material for the insertion therein of one or two free corners of the associated covering sheet, whereby the pocket flatly rests against the covering sheet and because of the inherent elastic tenacity of the artificial material of covering sheet and pocket elastically secures the free corner in closing position.
Holding pockets of a similar type for loose sheets of paper or the like have already been known for writing pads, photographic albums etc. Holding pockets of this known kind are provided on the outside of the supporting means to which the sheet of blotting paper or the photograph etc. is attached, and there are disposed iii each case four of these holding pockets to secure the sheet or sheets of blotting paper, photograph etc. in position. It is obvious, therefore, that these known holding pockets do not constitute a holding or closing means as described in the present invention.
The closing or holding pockets of the invention further serve as a means of protecting the edges of the documents etc. and of the cover against tearing, which is of particular importance for covers produced from artificial material. It is a well-known fact that the edges of articles of artificial material are more exposed to i wear and tear than other portions of the article, and that for that reason the lifetime of such articles depends to a large extent upon adequate protection of their edges, as slight injuries of the edges quickly enlarge and thus make the article unsuited for use. It is further known that reinforcement of the artificial material by metals or other suitable material is impossible. The protection of the edges against wear by means of the same material is, therefore, an important feature of the invention.
On the other hand, the fastening of the free corners of one covering sheet in the aforesaid holding pockets of the other covering sheet is important for the reason that it reliably prevents the documents etc. from slipping out of the smooth and slippery cover, particularly if the cover is filled up with such documents etc., or when a plurality of such covers are piled up on top of each other.
The invention will be best understood from a consideration of the following detailed description taken in connection with the accompanying drawings, forming a part of this specification, and in which two embodiments United States Pat n of the invention have been shown by way of illustration. However, I wish to state that the invention is not confined to any strict conformity with the showing of the drawing, but may be changed or modified, so long as such changes or modifications mark no material departure from the salient features of the invention as expressed in the appended claims.
In the drawing in which like or identical parts are referred to by the same reference characters Fig. 1 is an elevational view of a cover closed at its back and at its bottom;
Fig. 2 is an enlarged fragmentary and sectional view of a cover closed at its back and bottom and the free corner of its lower covering sheet engaging the pocket provided on the underside of the free corner of the upper covering sheet;
Fig. 3 is a modification, in which one of the covering sheets is provided with two long-stretched pockets.
In the embodiment illustrated in Figs. 1 and 2, the reference character a designates the upper covering sheet, while b denotes the lower covering sheet of the cover a, 1) consisting of artificial material and closed at its bottom e and at its back c is the pocket consisting likewise of artificial material and serving as closing means for the cover, and which may be arranged on the inside of the free upper corner of either the upper covering sheet a or lower covering sheet b of the cover.
As shown in Fig. 2 the upper and lower cover sheets a, b are rectangular in shape and have longitudinal and transverse edges, contiguous longitudinal edges 1 and transverse edges e are attached to each other. Pocket c is constituted by a substantially triangular shaped piece of plastic material joined in substantially fiat condition to the inner face of cover sheet a, as shown.
As will be seen from an inspection of the drawing, the pocket 0, in the embodiment of Fig. 2, has been provided on the upper covering sheet a, so that when the corresponding free upper corner of the lower covering sheet b is pushed into the pocket c, any documents etc. placed on said lower covering sheet b may thereby likewise be clampingly secured in their position. On the other hand, if the pocket c is provided on the lower covering sheet b, it may happen that the pocket 0 is covered up by the documents or the like placed on the lower covering sheet b, so that prior to pushing the corner of the upper covering sheet into the pocket 0 of the lower covering sheet the documents etc. would have to be lifted from the lower covering sheet.
In the modification illustrated in Fig. 3, the cover a is merely closed at its rear end or back 1" like an ordinary file cover, but provided on the inside of both of the free corners, of preferably the upper covering sheet a with pockets 0' and c" as shown in Fig. 2, into which the corresponding free corners of the lower covering sheet b together with documents etc. (now shown) when placed on it are pushed, so that slipping of the documents etc. from the then closed cover a is thereby reliably prevented.
In the embodiment of Fig. 3 the pockets 0', c" are of long-stretched formation, serving in this way simultaneously as a means of protecting the edges of the cover and of the documents etc. enclosed in the cover against tearing.
The pockets c, c may be secured to the cover in any customary manner, and in case two pockets are provided on the cover, they may be of equal or different size. In the latter case, the lower one should preferably be of larger size than the upper one.
As the inserted corners can easily be'retracted from the pockets, the opening of the cover is no problem in any Way.
It can thus be seen, that there has been provided according to the invention a file cover of smooth plastic material comprising an upper cover sheet, a lower cover sheet attached to said upper cover sheet along contiguous peripheral edge portions thereof for holding substantially flat articles therebetween, said cover sheets having each an end edge remote from said attached edge portions, and a polygonal-shaped piece of sheet material made of the same material as that of said cover sheets and joined in substantially fiat condition to the inner face of one of said cover sheets at at least one of said end edges, whereby at least one inner edge pocket is obtained in which the other end edge of said other cover sheet may be inserted and retained therein in closed position of said file cover, so that said articles when placed in the latter will be effectively prevented from slipping out of said file cover.
What I claim as new and desire to secure by Letters Patent of the United States is:
l. A file cover made of smooth plastic material eomby at least one inner edge pocket is obtained in which the other end edge of said other cover sheet may be inserted and retained therein in closed position of said file cover, so that said articles when placed in the latter will be effectively prevented from slipping out of said file cover' 2. A file cover made of plastic sheet material comprising a substantially rectangular-shaped upper cover sheet having longitudinal and transverse edges, a lower rectangular-shaped cover sheet having longitudinal and transverse edges, said cover sheets being attached to each other along two contiguous longitudinal and transverse edges of said sheets for holding substantially flat articles therebetween, said cover sheets having each a corner. portion remote from said attached edges, and a substantially triangular-shaped piece of plastic sheet material joined in substantially flat condition to the inner face of one of said cover sheets at the respective corner portion, whereby an inner corner pocket is obtained in which the corresponding opposite corner portion of said other cover sheet may be inserted and retained therein in closed position of said file cover, said pocket being of such dimension so as to prevent said articles when placed in said file cover from slipping out of the latter.
References Cited in the file of this patent UNITED STATES PATENTS 393,198 Young Nov. 20, 1888 807,648 Wiggins Dec. 19, 1905 945,710 Doxsee Jan. 4, 1910 1,850,059 Bolton Mar. 15, 1932 2,029,245 Lyon Jan. 28, 1936 2,137,826 Williams Nov. 22, 1938 2,227,191 MacLeod Dec. 31, 1940 2,628,650 Silva Feb. 17, 1953 Pin w