CN116100978A - Paper corner anti-rolling protective sleeve - Google Patents

Abstract

The invention discloses a paper corner anti-rolling protective sleeve, which comprises a front leaf and a rear leaf, wherein the front leaf is an L-shaped protective film formed by a book mouth position protective film and a book root position protective film, and the rear leaf is connected with the outer edge of the front leaf and forms an L-shaped accommodating space for inserting one corner of rectangular paper. According to the invention, the L-shaped protective film is arranged, so that the protective film can extend from the book opening position to the book root position, and page corners of pages in books are protected; the L-shaped protective film is arranged to reserve a writing area, so that writing is not influenced; through setting up the back leaf, be convenient for prevent rolling up the protective sheath to the paper angle and fix, avoid droing in the use. The design of the L-shaped front leaf greatly increases the cover pressure area of the book opening area and the book root area under the condition of not influencing writing and marking on books, and ensures the protection effect. The design of back leaf provides structural basis for enriching the function of protective sheath, can further expand paper angle prevent rolling up protective sheath into learning apparatus, books accessory, culture/advertising carrier etc..

Description

Paper corner anti-rolling protective sleeve

Technical Field

The invention belongs to the field of cultural goods, and relates to a paper corner anti-rolling protective sleeve.

Background

The books are the carriers of knowledge, and students use the books, such as teaching materials and exercise books, and have long service cycle and high frequency, so that the situation of corner rolling is very easy to occur. The lower the grade students, the easier the corners of the book (the corners of the book opening and the book root) are rolled.

In the prior art, in order to prevent the corner rolling of books, a plurality of solutions are proposed, which are roughly classified into two types of book covers and book corner protecting jackets. For example:

CN2902719 discloses a book cover of preventing rolling angle isolation operation, including envelope surface and cover bottom, the double-over department installation holding strip at envelope surface and cover bottom that says, its structural feature is: the inner sides of the two lower corners of the leather sealing surface are respectively provided with a cover included angle.

CN201077207 discloses a book corner rolling-proof device, two pieces of adhesive tape paper are respectively arranged on a hard book corner sleeve.

Although many corner protection schemes are disclosed in the prior art, few schemes are truly manufactured, marketed, and used because there are always certain problems.

The utility model provides a side angle book end is being sold openly on the electronic commerce platform, this book end comprises 2 right triangle plastic slab that overlap the setting and 2 spring clamps of connecting the plastic slab, and 2 spring clamps are installed respectively on right triangle's right angle edge, and conventional size is: the rectangular side length of the triangular plate is 25mm, and the thickness of the book end is 13mm.

In the process of implementing the present invention, the inventor finds that at least one of the following technical problems exists in the prior art:

a) Books have various specifications, various sizes and thicknesses, and covers with uniform sizes cannot be used;

b) The cover of the book can not directly protect the inner pages of the book, and can not fundamentally solve the problem of curling corners of the book, and students, particularly students in pupil, can cover the book cover in each school period and still have the problem of curling corners;

c) The existing book cover or book corner protective sleeve is not suitable for a homework book;

d) The book corner protective sleeve or the book corner clamp has the problem of inconvenient use, is suitable for clamping files or storing books, and is not suitable for use in study or operation; when learning or working, the book clip needs to be loosened every time when the pages are turned, the book clip is troublesome to use, and the book clip is easy to change into a small play of students; the corner book clamps are used for clamping book corners, so that the book corners can be prevented from doing work;

e) The corner book end is too thick and is not convenient to carry in the schoolbag;

f) The corner clips are also prone to damage.

g) When the operation is performed in a windy environment, pages of the book are easy to be blown over, and the operation is affected.

Disclosure of Invention

In view of the above, the invention aims to provide the corner rolling prevention protective sleeve which is convenient to use and is universal for books and books.

The inventor continuously reforms and innovates through long-term exploration and trial and repeated experiments and efforts, and the technical scheme provided by the invention is that the paper corner anti-rolling protective sleeve comprises a front leaf and a rear leaf, wherein the front leaf is an L-shaped protective film formed by a book mouth position protective film and a book root position protective film, and the rear leaf is connected with the outer edge of the front leaf and forms an L-shaped accommodating space for inserting one corner of rectangular paper.

According to one embodiment of the paper corner anti-rolling protective sleeve, the width of the book end position protective film is not larger than the width of the book end position margin, and the width of the book root position protective film is not larger than the width of the book root position margin.

According to one embodiment of the paper corner anti-rolling protective sleeve, the length of the book end protective film is 8-30 cm, and the width of the book end protective film is 0.5-2 cm; the length of the book root protective film is 8-30 cm, and the width is 0.5-3 cm.

According to one embodiment of the corner anti-curl protective sleeve of the present invention, the area of the back lobe is not smaller than the area of the front lobe.

According to one embodiment of the paper corner anti-rolling protective sleeve, the rear leaf is rectangular, the length of the rear leaf is not smaller than the length of the book end protective film, and the width of the rear leaf is not smaller than the length of the book end protective film; or the shape of the posterior leaflet includes one of the following shapes: conventional geometry, character image profile, cartoon image profile, weapon profile, natural landscape profile, historic site profile, or literature product profile.

According to one embodiment of the paper corner anti-rolling protective sleeve, the front leaf is a flexible transparent film; the thickness of the front leaf is 0.1 mm-0.22 mm.

According to one embodiment of the paper corner anti-rolling protective sleeve, the rear leaf is a flexible transparent film or a flexible semitransparent film or a flexible opaque film.

According to one embodiment of the corner anti-curl protective sleeve of the present invention, all or part of the area of one or both sides of the back leaf is provided as an anti-slip surface.

According to one embodiment of the paper corner anti-rolling protective sleeve, all or part of the area of one or both sides of the rear leaf is provided with an anti-slip coating.

According to one embodiment of the paper corner anti-rolling protective sleeve, the rear blade is provided with a through hole.

According to one embodiment of the paper corner anti-rolling protective sleeve, a through hole is formed in the rear leaf, and a rope is connected to the through hole.

According to one embodiment of the paper corner anti-rolling protective sleeve, the rear leaf is provided with a first extending folding part in a direction away from the book root position protective film.

According to one embodiment of the paper corner anti-rolling protective sleeve, the rear leaf is provided with a second extension folding part in the direction away from the book end protective film.

According to one embodiment of the paper corner anti-rolling protective sleeve, the rear leaf is provided with an adhesive part.

According to one embodiment of the paper corner anti-rolling protective sleeve, a graduated scale is arranged on part or all of the edge of the rear leaf.

According to one embodiment of the paper corner anti-curl protective sleeve of the present invention, the edge of the back leaf portion is provided as a protractor.

According to one embodiment of the paper corner anti-rolling protective sleeve, the rear blade is provided with a triangular plate hole.

According to one embodiment of the paper corner anti-rolling protective sleeve, the free edge of the rear leaf is provided with a wavy line.

According to one embodiment of the corner anti-curl protective sleeve of the present invention, the rear leaf is provided with a plurality of through holes of conventional geometry.

According to one embodiment of the paper corner anti-rolling protective sleeve, one or two surfaces of the rear leaf are provided with a text information layer.

According to one embodiment of the paper corner anti-rolling protective sleeve, one or two surfaces of the rear leaf are provided with pattern identification layers.

According to one embodiment of the corner anti-roll protective sleeve of the present invention, the size of the back leaf is equal to the size of the book back cover.

According to one embodiment of the corner anti-roll sleeve of the present invention, the rear leaf is configured as a back cover.

According to one embodiment of the corner anti-curl protective sleeve of the present invention, the back leaf is configured as a cover

According to one embodiment of the corner anti-roll sleeve of the present invention, the back leaves are equal in size to the book cover, spine and back cover.

According to one embodiment of the corner anti-curl protective sleeve of the present invention, the rear leaf is configured as a self-adhesive cover.

According to one embodiment of the paper corner anti-rolling protective sleeve, the front blade and the rear blade are formed by folding the same film; the folding line is positioned at the edge of the book end protective film, and the edge of the book root protective film is connected with the rear leaf; or the folding line is positioned at the edge of the book root position protective film, and the edge of the book mouth position protective film is connected with the rear leaf.

According to one embodiment of the paper corner anti-rolling protective sleeve, corners, which are not connected with the rear leaves, on the L-shaped protective film are arranged to be arc corners.

According to one embodiment of the paper corner anti-rolling protective sleeve, at least one indentation which is parallel to the book end and pressed from inside to outside is arranged on the book end position protective film.

According to one embodiment of the paper corner anti-rolling protective sleeve, the book root position protective film is provided with at least one indentation which is parallel to the book root and is pressed from inside to outside

Compared with the prior art, one of the technical schemes has the following advantages:

a) According to the invention, the L-shaped protective film is arranged, so that the protective film can extend from the book opening position to the book root position, and page corners of pages in books are protected; the L-shaped protective film is arranged to reserve a writing area, so that writing is not influenced; through setting up the back leaf, be convenient for prevent rolling up the protective sheath to the paper angle and fix, avoid droing in the use.

b) According to the invention, through the design of the L-shaped front leaf, the cover pressure area of the book opening area and the book root area is greatly increased under the condition that writing and marking on books are not affected, and the protection effect is ensured. The page turning back can be directly and quickly inserted into the paper corner anti-rolling protective sleeve, and the use experience is better than that of all the existing book corner protective sleeves or clamps.

c) The rear leaf and the front leaf adopt a film structure, the accommodation thickness of the pages is variable, and 1 paper sheet can be accommodated, and 10-20 paper sheets can be accommodated.

d) The structural design of the paper corner anti-rolling protective sleeve does not influence page turning of books, and has a windproof effect.

e) The invention provides a structural foundation for enriching the functions and the roles of the paper corner anti-rolling protective sleeve through the design of the rear leaf, and can further expand the paper corner anti-rolling protective sleeve into learning tools, book accessories, culture/advertisement propaganda carriers and the like.

f) The paper corner anti-rolling protective sleeve is of a double-layer film structure, is thin, can be clamped in books, is convenient to carry, and can be used as a bookmark.

g) The paper corner anti-rolling protective sleeve has the advantages of simple structure, wide selection range of manufacturing materials, convenient manufacture and low manufacturing cost.

h) The paper corner anti-rolling protective sleeve can be used as a novel front cover and/or back cover of a book, and the anti-rolling protective sleeve does not need to be additionally used.

i) The paper corner anti-rolling protective sleeve can be directly used as a self-adhesive book case protective sleeve.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some examples of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic perspective view of a paper corner anti-rolling protective sleeve according to a preferred embodiment of the invention.

Fig. 2 is a schematic view of the book end of fig. 1 in a unfolded state.

Fig. 3 is a schematic view of the book root direction expanding state of fig. 1.

Fig. 4 is a schematic front view of another embodiment of the corner rolling-preventing protective sleeve according to the present invention.

Fig. 5 is a schematic front view of another embodiment of the corner rolling-preventing protective sleeve according to the present invention.

Fig. 6 is a schematic front view of another embodiment of the corner anti-curl protective cover of the present invention.

Fig. 7 is a schematic front view of another embodiment of the corner rolling-preventing protective sleeve according to the present invention.

Fig. 8 is a schematic front view of another embodiment of the corner rolling-preventing protective sleeve according to the present invention.

Fig. 9 is a schematic diagram showing a front view of the paper corner anti-rolling protective sleeve as a back cover.

Fig. 10 is a schematic diagram showing a front view of the paper corner anti-rolling protective sleeve as a book case.

The marks in the figure are respectively:

the front leaf of the Chinese herbal medicine tea is 100,

110 book opening protecting film,

120 book root position protective film,

a 101 scale is used for a scale,

200 the rear leaf of the leaf-shaped tea,

201 a through-hole,

a 202 string of wire which is connected with the wire,

203 a protractor, the angle gauge is provided with a measuring device,

a bonding portion 204 of the adhesive sheet,

205 a first fold extension;

206 a second fold extension.

Detailed Description

The following description is of one embodiment with reference to the accompanying drawings.

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention. Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus, once an item is defined in one figure, it may not be further defined and explained in the following figures.

Example 1.

See fig. 1. The paper corner anti-rolling protective sleeve described in the embodiment comprises a front blade 100 and a rear blade 200, wherein the front blade 100 is an L-shaped protective film formed by a book end protective film 110 and a book root protective film 120, and the rear blade 200 is connected with the outer edge of the front blade 100 and forms an L-shaped accommodating space for inserting one corner of rectangular paper.

The book mouth is the position relative with books, to the textbook, the book mouth is located the right edge of textbook, and the book mouth position protection film 110 is the paper angle and prevents rolling up the protection film that the protective sheath is located the book mouth direction of book in the use, and the book mouth position protection film 110 does not necessarily cover the full length of book mouth, also can be a part, and the length of the book mouth protection film 110 can be equal to the length of book mouth, can be greater than the length of book mouth, also can be less than the length of book mouth.

In some preferred embodiments, the length of the stoma protective membrane 110 is greater than 1/4 of the stoma length and less than 1/2 of the stoma length.

In some embodiments, the length of the stoma site protecting film 110 is any length between 8 and 30cm, for example 10, 11cm, 12cm, 13cm, 14cm, 15cm, 16cm, 17cm, 18cm, 19cm, 20cm, 21cm, 22cm, 23cm, 24cm, 25cm, 26cm, 27cm, 28cm, 29cm. Preferably, the length of the book end protective film 110 is set to be 20cm, so that the matched use of all books except a pupil dictionary can be basically satisfied.

The width of the protective film 110 is any width between 0.5 cm and 2cm, for example, 1.0cm, 1.5cm, 1.8cm, etc., and the width is not too narrow or too wide. The book end protective film 110 is too narrow, and the pages easily slide out of the L-shaped accommodating space; too wide may interfere with writing and may, in particular, obscure the writing area of the exercise book. The distance between the right edge of the primary school Chinese teaching material is 1.5cm, the distance between the right edge of a part of the exercise book is 1.2cm, and the width of the book opening protecting film 110 is set to be 1.5cm.

The length of the root position protective film 120 is 8-30 cm and the width is 0.5-3 cm. Preferably, the length of the root position protective film 120 is set to 10cm and the width is set to 3cm.

The root is the lower edge of the book, the root position protection film 120 is a protection film of which the paper corner anti-rolling protection sleeve is positioned in the root direction of the book in the use process, the root position protection film 120 does not necessarily cover the whole length of the root, and can be a part, namely the length of the root protection film 120 can be equal to the length of the root, can be smaller than the length of Yu Shu root, but cannot be larger than the length of the heel.

Preferably, the length of the root position protective film 120 is 1/3 or more of the length of the root and 2/3 or less of the length of the mouth.

Of course, the opening protecting film 110 and the root protecting film 120 may be provided according to the size of 64 books or 32 books. For example, the length of the opening protecting film 110 is set to 64 open-book opening length, and the length of the root protecting film 120 is set to 64 open-book root length; the paper corner anti-rolling protective sleeve with the size can be used for protecting the book corners of a 64-open book, and can also be used for protecting the book corners of a 32-open book and books with any size larger than the 64-open book.

Preferably, the corners of the inner edges of the fore-edge protecting film 110 and the root protecting film 120 are arc corners, so that the fore-edge protecting film 110 and the root protecting film 120 are prevented from being torn at the corners.

The rear leaf 200 is a film which is beneficial to fixing the paper corner anti-rolling protective sleeve on a book, the rear leaf 200 can be clamped in the book by directly utilizing the clamping force/friction force between the paper sheets of the book, and the paper corner anti-rolling protective sleeve is prevented from falling off from the book by utilizing the friction force between the upper surface and the lower surface of the rear leaf 200 and the paper sheets. Preferably, to ensure sufficient friction between the rear blade 200 and the paper, the area of the rear blade 200 is not smaller than that of the front blade 100. Fig. 1, 4, 5, 6, and 7 each show a case where the area of the rear leaf 200 is larger than that of the front leaf 100, and fig. 8 shows a case where the area of the rear leaf 200 is equal to that of the front leaf 100. The paper corner anti-rolling protective sleeve shown in fig. 8 is convenient to use and has other schematic structures.

The rear blade 200 and the front blade 100 have a difference in area, so that the rear blade 200 is more conveniently separated from the inner edge of the front blade 100, i.e., the L-shaped accommodating space is easier to open, and paper is more conveniently inserted into the L-shaped accommodating space.

The shape of the rear leaf 200 is not particularly limited, and generally speaking, the larger the area of the rear leaf 200 is, the more favorable the friction force between the rear leaf 200 and paper is increased, and the more favorable the paper corner anti-rolling protective sleeve is prevented from falling off from the book. The rear leaf 200 has a large area, can be used as an information carrier for development and utilization, and takes the paper corner anti-rolling protective sleeve as a brand new auxiliary learning tool.

Compared with the paper corner anti-rolling protective sleeve shown in fig. 1, the paper corner anti-rolling protective sleeve shown in fig. 8 is easier to fall off, particularly in summer, the friction force between the skin of the forearm and 100 front leaves of a person is large, and when the forearm is moved, the paper corner anti-rolling protective sleeve is easier to take out from a book.

Fig. 1 shows a case where the rear leaf 200 is rectangular, the length of the rear leaf 200 is equal to the length of the throat protecting film 110, and the width of the rear leaf 200 is equal to the length of the root protecting film 120. In addition to rectangles, the posterior leaflet 200 may be configured in any other positive upward pattern, such as conventional geometric patterns, character figures, cartoon figures, weapon figures, natural landscape figures, historic ancient figures, literature figures, etc.

Generally, the width of the rear leaf 200 is not greater than the width of the book, and the length of the rear leaf 200 may be greater than the length of the book, so that the pages of the book inserted into the L-shaped receiving space are ensured to be in full contact with the inner surface of the L-shaped receiving space when in use.

The rear leaf 200 is connected to the outer edge of the front leaf 100, the term "outer edge" is relative to the state of the paper corner anti-roll protective cover in the use state, that is, the edge exposed outside the book is the outer edge, and the edge clamped inside the book is the inner edge.

The term "attachment" is a prior art attachment means, and the materials of the front and back lobes 110, 120 are adapted to select a particular attachment means, such as adhesive, hot melt attachment, etc.

The rear leaf 200 is connected to the outer edge of the front leaf 100 and forms an L-shaped receiving space into which one corner of a rectangular sheet of paper is inserted, and the L-shaped receiving space may be inserted into one sheet of paper, or may be inserted into a plurality of sheets of paper. The quantity of the paper inserted into the L-shaped accommodating space is too large, so that the edge of the L-shaped protective film is tilted, and the use is affected. Optionally, in order to reduce the degree of edge warping of the L-shaped protective film caused by too many sheets being inserted, at least one indentation is provided on the throat-position protective film 110, the indentation being pressed from inside to outside in parallel with the throat, and at least one indentation is provided on the root-position protective film 120, the indentation being pressed from inside to outside in parallel with the root. The indentation is carried out only from the inner side surface of the L-shaped accommodating space to the outer side surface of the L-shaped accommodating space from inside to outside, and when a large amount of paper is inserted into the L-shaped protective film, the edge of the L-shaped accommodating space bends towards the direction of the inserted pages.

According to this feature, the target of the single reading amount can be set by utilizing the feature of the accommodation amount of the L-shaped accommodation space at the time of use, for example, at the time of reading. However, when a proper amount of paper is inserted into the L-shaped accommodating space, the edge of the L-shaped protective film is slightly tilted, so that the turned pages can be turned back and inserted into the L-shaped accommodating space.

The flexible transparent film may be a plastic film used in the art to make transparent document pouches.

The rear blade 200 is made of the same material as the front blade 100, which is more favorable for production and manufacture, but is a product type of a rich paper corner anti-rolling protective sleeve, and can also be made of different materials, for example, the front blade 100 is a flexible transparent film, and the rear blade 200 is a flexible opaque film or a flexible semitransparent film.

In this embodiment, the front leaf 100 and the rear leaf 200 are flexible transparent films; the anterior leaflet 100 has a thickness of any one of between 10 and 22 filaments, 1 filament being equal to 0.01mm, with a recommended thickness of 16 filaments or 20 filaments.

In one embodiment, the front and back leaves 100, 200 are two different films that are joined by bonding, hot melt, or the like to form a corner wrap protection sleeve.

In a preferred embodiment, the front leaf 100 and the rear leaf 200 are formed by folding a same film, firstly cutting the film according to the unfolding shape of the paper corner anti-rolling protective sleeve, then folding the film along the book edge folding line L1 or the book root folding line L2, and finally performing connection treatment.

Referring to fig. 2, the mouth position folding line L1 is located at the edge of the mouth position protective film 110. The film is cut according to the shape shown in fig. 2, then folded along the edge folding line L1, pressed to form a crease, and finally the edge of the root protecting film 120 is connected to the rear leaf 200.

Or referring to fig. 3, the root position folding line L2 is located at the edge of the root position protective film 120. The film is cut according to the shape shown in fig. 3, then folded by the root position folding line L2, pressed to form a crease, and finally the edge of the mouth position protecting film 110 is connected with the rear leaf 200.

Because the paper corner anti-rolling protective sleeve adopts a film structure, the paper corner anti-rolling protective sleeve is placed in a book, and the length, width and thickness dimensional changes of the book are almost negligible.

Through the paper corner anti-rolling protective sleeve use test, a plurality of papers are recommended to be inserted into the paper corner anti-rolling protective sleeve when in use, and the paper corner anti-rolling protective sleeve is only required to be installed and fixed once for reading and working once, so that the book turning and writing are very convenient in the reading and working processes.

The paper corner anti-rolling protective sleeve is also a windproof protective sleeve, and compared with the corner book end, the paper corner anti-rolling protective sleeve has larger coverage area for pages, and wind experiments show that after the paper corner anti-rolling protective sleeve is adopted, the pages of the book still cannot be blown to turn over under the strong wind action of the household fan.

The paper corner anti-rolling protective sleeve is also a bookmark, the thickness of the paper corner anti-rolling protective sleeve is the thickness of two layers of films, after reading books or working is finished, the paper corner anti-rolling protective sleeve is reserved, the book is closed, and when reading books or working next time, the book can be immediately read to the position of the previous reading or working, so that the function of positioning the bookmark is realized.

The paper corner anti-rolling protective sleeve can also be directly inserted into books to be used as a bookmark.

In a further preferred embodiment, to increase the friction between the rear blade 200 and the paper surface, the front or rear surface of the rear blade 200, or all or part of the area of the front and rear surfaces, is provided as an anti-slip surface.

In a further preferred embodiment, to increase the friction between the rear leaf 200 and the paper surface, all or part of the area of one or both sides of the rear leaf 200 is provided with a non-slip coating, such as a transparent rubber, in particular a silicone layer.

The rear blade 200 can be made of any anti-slip film or anti-slip composite film which can be used for manufacturing paper corner anti-rolling protective sleeves in the prior art.

Example 2.

Referring to fig. 4, in this embodiment, on the basis of embodiment 1, a through hole 201 is provided on a rear leaf 200 of a paper corner anti-rolling protective sleeve.

The through holes 201 are arranged at the positions far away from the protective corners, the through holes 201 are connected with ropes 202, the ropes 202 can be used as label bands, can also be tied into rings and are clamped in books to increase friction force of the rear leaves 200, or are hung on the opposite corners of the protective corners to fix the rear leaves.

Example 3.

Referring to fig. 5, in this embodiment, to enrich the function of the paper corner anti-rolling protective sleeve based on embodiment 1, a protractor 203 is configured at a part of the edge of the rear blade 200. The protractor 203 is part of the posterior leaflet 200. The protractor 203 may be manufactured by printing, embossing, or any other method in which a protractor can be manufactured on a transparent film in the prior art.

Referring to fig. 8, a scale is provided at the edge of the rear blade 200 or the edge of the front blade 100, and may be used as a ruler.

And, on the rear leaf 200, may be selectively provided: right angle triangular plate holes, regular geometric through holes, a text information layer and a pattern identification layer.

The right triangle holes can also be directly called right triangle holes, and comprise isosceles right triangle holes and slender right triangle holes (the acute angles are 30 degrees and 60 degrees respectively), and the sizes of the right triangle holes refer to isosceles right triangle plates and slender right triangle plates in primary school learning tools.

Conventional geometric through-holes such as triangular (including isosceles triangle, equilateral triangle), rectangular, square, parallelogram, diamond, regular pentagon, regular hexagon, circle, ellipse, line (straight line, wavy line) holes, and the like. By providing these through holes, the friction between the rear blade 200 and the paper can be increased.

The text information layer can be a blank information area and is used for temporarily writing and recording text information; or knowledge information such as numbers/theory/formulation formulas, tables of know-how, knowledge point thinking guide, reputation, book introduction, book author introduction, etc. has been recorded. The paper corner anti-rolling protective sleeve can be independently used as a protective sleeve and can also be used as book accessories similar to a floating seal, so that the book reading experience is improved. And a propaganda carrier is added for books and other products.

The pattern marking layer forms a pattern with distinguishing marks on the rear leaf 200 by means of spray painting, printing and the like, or can promote the reading and operation interest, or embody the figure outline, cartoon figure outline, weapon outline, natural landscape outline, historic site outline or the shape of the outline of the literature product of the rear leaf 200.

The thickness of the text information layer and the pattern identification layer is extremely thin, so that the coating structure is not illustrated in the drawings of the specification, but the repeated implementation of the embodiment scheme by a person skilled in the art is not prevented.

Example 4.

See fig. 6 and 7. The embodiment further enriches the embodiment of the paper corner anti-rolling protective sleeve structure on the basis of the embodiment 1.

Referring to fig. 6, a first extension fold 205 is provided on the rear leaf 200 of the corner anti-curl protective sleeve; the first extension fold 205 extends in a direction away from the root position protective film 120, i.e. is connected to a foldable extension on an inner edge parallel to the root position protective film 120.

Referring to fig. 7, a second extension fold 206 is provided on the rear leaf 200 of the corner anti-curl protective sleeve; the second extension fold 206 extends in a direction away from the mouth piece protective film 110, i.e., is connected to a foldable extension on an inner edge parallel to the mouth piece protective film 110.

In a preferred embodiment, the posterior leaflet 200 is rectangular, and the shape of the first or second extension fold 205, 206 is complementary to the shape of the anterior leaflet 110.

Taking the first extension folded portion 205 as an example, the first extension folded portion 205 is just folded with the front blade 110 to be rectangular with the same size as the rear blade 200. The arrangement mode enables a roll of film to be cut continuously, improves the utilization rate of the film, and increases the area of the rear blade 200.

The film is continuously cut according to the unfolded shape of the corner anti-roll sleeve shown in fig. 6, and then folded along the root fold line L2, and folded along the first extended fold line L3, and the front leaf 110 and the rear leaf 120 are heat-fused to join the edges of the mouth.

Example 5.

Referring to fig. 6, this embodiment is an embodiment of the paper corner anti-rolling protective sleeve structure further enriched on the basis of embodiment 1.

The rear blade 200 of the paper corner anti-rolling protective sleeve is provided with an adhesive part 204; the adhesive part 204 is provided with a weak adhesive area, and the weak adhesive is instant adhesive. The sticking part 204 is recommended to be arranged in a region far away from the protection corner, and the rear leaf 200 is stuck on the book by arranging the sticking part, so that the paper corner anti-rolling protection sleeve is less prone to falling. The instantaneous adhesive is selected, so that the paper of the book is not damaged. The adhesive weakens after multiple sticks, but still helps to increase the friction between the rear blade 200 and the paper.

For exercise books with thinner thickness, the rear leaf 200 can be stuck on the back face of the book back cover or other similar pages, all pages of the exercise book are inserted into the L-shaped accommodating space, and the pages are gradually released from the L-shaped accommodating space according to the operation progress.

Example 6.

See fig. 9. The paper corner rolling-preventing protective sleeve described in the embodiment is used as a book cover structure or a novel book back cover structure, and the paper corner rolling-preventing protective sleeve structure can be arranged on the front cover and the back cover of the book at the same time on the same book, and the paper corner rolling-preventing protective sleeve structure can also be arranged on the back cover only.

The back leaf 200 serves as a book cover or book back cover, and the front leaf 100 is inside the book. The paper corner anti-rolling protective sleeve is directly arranged on the book, a certain requirement is met on the thickness of the book, and the paper corner anti-rolling protective sleeve can be arranged on the front cover and/or the back cover of the contact book of the pupil.

Example 7.

See fig. 10. The paper corner rolling-preventing protective sleeve described in this embodiment is a book cover, and the size of the rear leaf 200 is the sum of the total area of the front cover, the spine and the back cover of the book, that is, the rear leaf 200 can completely cover the outer surface of the book case, and is adhered to the outer surface of the book case through the adhesive part 204. The attachment portions 204 are in a plane, or line or multi-point distribution. Before use, release paper is arranged, when the book case is adhered, the release paper is torn off, and then the rear leaf 200 is connected with the outer surface of the book case.

The foregoing is merely a preferred embodiment of the present invention, and it should be noted that the above-mentioned preferred embodiment should not be construed as limiting the invention, and the scope of the invention should be defined by the appended claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the invention, and such modifications and adaptations are intended to be comprehended within the scope of the invention.

Claims (10)

1. The paper corner anti-rolling protective sleeve is characterized by comprising a front leaf and a rear leaf, wherein the front leaf is an L-shaped protective film formed by a book mouth position protective film and a book root position protective film, and the rear leaf is connected with the outer edge of the front leaf and forms an L-shaped accommodating space for inserting one corner of rectangular paper.

2. The corner protective sleeve of claim 1 wherein said lip portion protective film has a width no greater than a lip portion margin width and said root portion protective film has a width no greater than a root portion margin width.

3. The paper corner anti-rolling protective sleeve according to claim 2, wherein the length of the book end protective film is 8-30 cm, and the width is 0.5-2 cm; the length of the book root protective film is 8-30 cm, and the width is 0.5-3 cm.

4. A corner anti-curl protective cover according to claim 1 or 2 or 3, wherein the area of the back leaves is not smaller than the area of the front leaves.

5. The paper corner anti-rolling protective sleeve according to claim 3, wherein the rear leaf is rectangular, the length of the rear leaf is not smaller than the length of the book end protective film, and the width of the rear leaf is not smaller than the length of the book end protective film; or the shape of the posterior leaflet includes one of the following shapes:

conventional geometry, character image profile, cartoon image profile, weapon profile, natural landscape profile, historic site profile, or literature product profile.

6. The paper corner anti-curl protective sleeve of claim 1, wherein said front leaf is a flexible transparent film; the thickness of the front leaf is 0.10 mm-0.22 mm.

7. The paper corner anti-roll protective sleeve of claim 1 wherein said back leaf is a flexible transparent film or a flexible translucent film or a flexible opaque film.

8. The paper corner anti-curl protective cover of claim 1 or 7, wherein said rear leaf is provided with one or more of the following structures:

a) All or part of the area of one or both sides of the rear leaf is set as an anti-slip surface;

b) All or part of the area of one or both sides of the rear leaf is provided with an anti-slip coating;

c) The rear leaf is provided with a through hole;

d) The rear leaf is provided with a through hole, and the through hole is connected with a rope;

e) A first extension folding part is arranged on the rear leaf in the direction away from the book root position protective film;

f) A second extension folding part is arranged on the rear leaf in the direction away from the book opening position protective film;

g) The rear leaf is provided with a pasting part;

h) The edge of part or all of the rear leaf is provided with a graduated scale;

i) The edge of the rear leaf part is set as a protractor;

j) The rear blade is provided with a triangular plate hole;

k) The free edge of the rear leaf is provided with a wavy line;

l) a plurality of through holes with conventional geometric shapes are arranged on the rear leaf;

m) one or two surfaces of the rear leaf are provided with a text information layer;

n) one or two surfaces of the rear leaf are provided with pattern identification layers;

o) the size of the rear leaf is equal to the size of the book back cover;

p) the rear leaf is configured as a back cover;

q) the rear leaf is constructed as a cover;

r) the size of the rear leaf is equal to the sizes of the book cover, the book spine and the back cover;

s) the rear leaf is constructed as a self-adhesive book cover.

9. The corner protective sleeve according to claim 1, 2, 3 or 6, wherein the front and rear leaves are formed by folding a single film; the folding line is positioned at the edge of the book end protective film, and the edge of the book root protective film is connected with the rear leaf; or the folding line is positioned at the edge of the book root position protective film, and the edge of the book mouth position protective film is connected with the rear leaf.

10. The paper corner anti-rolling protective sleeve according to claim 1, 2, 3 or 6, wherein corners, which are not connected with the rear leaves, on the L-shaped protective film are arranged as arc corners; or at least one indentation which is parallel to the book opening and pressed from inside to outside is arranged on the book opening position protective film; or at least one indentation which is parallel to the book root and is pressed from inside to outside is arranged on the book root position protective film.

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