US20040096613A1 - Waterproof bags - Google Patents
Waterproof bags Download PDFInfo
- Publication number
- US20040096613A1 US20040096613A1 US10/712,096 US71209603A US2004096613A1 US 20040096613 A1 US20040096613 A1 US 20040096613A1 US 71209603 A US71209603 A US 71209603A US 2004096613 A1 US2004096613 A1 US 2004096613A1
- Authority
- US
- United States
- Prior art keywords
- waterproof
- woven fabric
- bag
- film
- base component
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 4
- 239000000057 synthetic resin Substances 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- 239000002759 woven fabric Substances 0.000 description 89
- 238000000034 method Methods 0.000 description 57
- 238000003475 lamination Methods 0.000 description 36
- 238000001816 cooling Methods 0.000 description 8
- 238000009941 weaving Methods 0.000 description 7
- 238000004078 waterproofing Methods 0.000 description 6
- 230000002708 enhancing effect Effects 0.000 description 4
- 239000004744 fabric Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000009877 rendering Methods 0.000 description 2
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 2
- 229920002554 vinyl polymer Polymers 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- -1 e.g. Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B1/00—Layered products having a non-planar shape
- B32B1/08—Tubular products
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
- B65D31/02—Bags or like containers made of paper and having structural provision for thickness of contents with laminated walls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B2155/00—Flexible containers made from webs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B2170/00—Construction of flexible containers
- B31B2170/20—Construction of flexible containers having multi-layered walls, e.g. laminated or lined
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
- Y10T428/1362—Textile, fabric, cloth, or pile containing [e.g., web, net, woven, knitted, mesh, nonwoven, matted, etc.]
Definitions
- the present invention relates to bags and a method of producing the bag and, more particularly, to cylindrical (i.e., cylindrically-shaped) waterproof bags and a method of producing the same, wherein the bags have improved aesthetics and functionality.
- FIG. 1 illustrates an example of one such conventional cylindrical waterproof bag 150 .
- the cylindrical waterproof bag 150 includes a cylindrically woven fabric 100 , and two waterproof films 200 laminated to the outer surface of the woven fabric 100 .
- the cylindrically woven fabric 100 is laid flat and wrapped around a bobbin. Then the cylindrically woven fabric 100 is unwound from the bobbin and passed through a conventional film compressor to adhere two waterproof films 200 on the opposite sides of the outer surface of the woven fabric 100 to fabricate the cylindrical waterproof bag 150 .
- a conventional film compressor to adhere two waterproof films 200 on the opposite sides of the outer surface of the woven fabric 100 to fabricate the cylindrical waterproof bag 150 .
- the cylindrical waterproof bag 100 includes a pair of projections 201 that are created at the ends where the two waterproof films 200 meet.
- Such projections 201 render the bag 150 less attractive and less functional.
- the projections 201 either freeze or become stiff and can cut fingers when the bags 150 are handled. These problems limit the practical use of the waterproof bags 150 .
- cylindrical bags made of vinyl are generally used if the bags need printing on the outer surface of the bags, e.g., for advertisement purposes.
- such bags are not durable and often cannot be re-used.
- an object of the present invention is to provide a waterproof bag and a method of producing the waterproof bag, which overcome problems associated with conventional waterproof bags and conventional methods of producing the waterproof bags.
- Another object of the present invention is to provide a waterproof bag and a method of producing the same, wherein the waterproof bag has improved waterproofing functionality, improved aesthetics and improved durability with good printing quality.
- the present invention is directed a method of producing a waterproof object, the method comprising the steps of first applying first and second waterproof films respectively onto first and second outer surfaces of a base component, such that the base component includes first and second non-laminated outer surface areas; refolding the base component so as to position the first and second non-laminated outer surface areas in certain regions of the base component; and second applying third and fourth waterproof films respectively onto the first and second non-laminated outer surface areas of the base component and onto first and second end portions of the first and second waterproof films.
- the present invention is also directed to a waterproof object comprising a base component having first, second, third and fourth outer surfaces; first and second waterproof films respectively disposed on the first and second outer surfaces of the base component, such that the third and fourth outer surfaces are devoid of the first and second waterproof films; and third and fourth waterproof films respectively disposed on the third and fourth outer surfaces of the base component and over first and second end portions of the first and second waterproof films.
- the present invention is directed to a waterproof bag comprising a woven base component; at least one waterproof film adhered to an inner surface of the base component; and a photo film adhered to an outer surface of the base component to produce the waterproof bag.
- the present invention is directed to a system for producing a waterproof object using a base component, the system comprising a first application section for respectively applying first and second waterproof films onto first and second outer surfaces of the base component, such that the base component includes first and second non-laminated outer surface areas; a refolding section for refolding the base component so as to position the first and second non-laminated outer surface areas in certain regions of the base component; and a second application section for respectively applying third and fourth waterproof films onto the first and second non-laminated outer surface areas of the base component and onto first and second end portions of the first and second waterproof films.
- FIG. 1 is a perspective view of a conventional cylindrical waterproof bag
- FIG. 2 is a perspective view of a cylindrical waterproof bag according to one embodiment of the present invention.
- FIGS. 3A and 3B are diagrams of a system for producing a cylindrical waterproof bag according to one embodiment of the present invention.
- FIG. 4 is a cross-sectional view of a bag, cut along line A-A of FIG. 3A, according to one embodiment of the present invention
- FIG. 5 is a cross-sectional view of a bag, cut along line B-B of FIG. 3A, according to one embodiment of the present invention
- FIG. 6 is a cross-sectional view of a bag, cut along line C-C of FIG. 3A, according to one embodiment of the present invention.
- FIG. 7 is a cross-sectional view of a bag that has been refolded, cut along line D-D of FIG. 3A, according to one embodiment of the present invention.
- FIG. 8 is a cross-sectional view of a bag, cut along line E-E of FIG. 3B, according to one embodiment of the present invention.
- FIG. 9 is a cross-sectional view of a bag, cut along line F-F of FIG. 3B, according to one embodiment of the present invention.
- FIG. 10 is a perspective view of a cylindrical waterproof bag according to another embodiment of the present invention.
- FIG. 2 is an example of a cylindrical waterproof bag 10 according to one embodiment of the present invention.
- the cylindrical waterproof bag 10 includes a cylindrically woven fabric 1 , first and second waterproof films 2 a and 2 b laminated to the opposite first and second outer surfaces of the woven fabric 1 , and third and fourth waterproof films 3 a and 3 b adhered over the opposite third and fourth outer surfaces of the woven fabric 1 and over the end portions of the first and second waterproof films 2 a and 2 b .
- the first and second waterproof films 2 a and 2 b are symmetrically opposed from each other, and the third and fourth waterproof films 3 a and 3 b are symmetrically opposed from each other.
- the woven fabric 1 is formed of synthetic resin yarns made of known materials, e.g., PP, PE, etc., and may be weaved using conventional techniques or conventional circular weaving machines.
- the woven fabric may be weaved in a net configuration wherein synthetic yarns extend in a longitude/lengthwise direction and are intertwined with other synthetic yarns extending in a latitude/widthwise direction.
- the third and fourth waterproof films 3 a and 3 b overlap end portions of the first and second waterproof films 2 a and 2 b .
- the first and second waterproof films 2 a and 2 b cover much greater surface than the third and fourth waterproof films 3 a and 3 b . That is, the first and second outer surfaces of the woven fabric 1 are larger in size than the third and fourth outer surfaces of the woven fabric 1 .
- the first and second waterproof films 2 a and 2 b may be smaller in size than the third and fourth waterproof films 3 a and 3 b , if needed.
- the waterproof films 2 a and 2 b can be preprinted with photographic images or other graphical images for providing advertisements and other aesthetical characteristics to the cylindrical bag 10 as desired.
- any information and/or image may be provided on or as part of the first and second waterproof films 2 a and 2 b using any known technique.
- a photo film containing images, printing, or the like can be adhered or laminated to an outer surface of at least one of the first through fourth waterproof films 2 a , 2 b , 3 a and 3 b . This results in a waterproof bag with improved printing quality.
- first to fourth waterproof films 2 a , 2 b , 3 a and 3 b cover the entire outer surface of the woven fabric 1 , the waterproofing functionality of the bag 10 is greatly improved. Moreover, since the first through fourth waterproof films 2 a , 2 b , 3 a and 3 b are applied to the outer surface of the woven fabric 1 in a way that eliminates projections 120 of conventional cylindrical waterproof bags, the aesthetics and safety of the waterproof bag 10 are improved significantly.
- a method of producing the cylindrical waterproof bag 10 according to one embodiment of the present invention is as follows. This method can be implemented using a system 50 for producing cylindrical waterproof bags as shown in FIGS. 3A and 3B.
- the woven fabric 1 is provided by weaving synthetic yarns or the like using any conventional circular weaving machine or existing techniques. Then the woven fabric 1 is passed to the system 50 which transforms the woven fabric 1 into a waterproof bag according to the embodiments of the present invention.
- the woven fabric 1 Prior to being processed by the system 50 , the woven fabric 1 may be flattened, e.g., by being passed through a pair of stamp rollers.
- the flattened woven fabric 1 can be transported directly from the circular weaving machine to the system 50 , or can be wound unto a bobbin and subsequently unwound from the bobbin and supplied to the system 50 at an appropriate time.
- the woven fabric 1 functions as a base component unto which waterproof films can be applied to produce a waterproof bag.
- FIG. 3A the flattened woven fabric 1 enters the system 50 where FIG. 4 shows a cross-sectional view of the woven fabric 1 at this time, cut along line A-A of FIG. 3A.
- the flattened or folded woven fabric 1 has a width of W1.
- a first lamination process of the method is performed.
- a first waterproof film 2 a is applied to a first outer surface S 1 of the woven fabric 1 using a first film compressor 4 a .
- the first film compressor 4 a laminates the first waterproof film 2 a onto the first outer surface S 1 according to existing lamination techniques.
- the first waterproof film 2 a is laminated to the woven fabric 1 using T-dice.
- the first waterproof film 2 a may be adhered to the first outer surface S 1 using other existing material adherence techniques.
- the woven fabric 1 laminated with the first waterproof film 2 a is passed between a pair of transport rollers 5 a and 5 b .
- the transport rollers 5 a and 5 b can apply pressure to the laminated waterproof film 2 a to further secure the lamination.
- the upper transport roller 5 a can include a known water-cooling or air-cooling roller for enhancing the close adherence of the waterproof film 2 a to the first outer surface S 1 of the woven fabric 1 . This completes the first lamination process.
- FIG. 5 shows a cross-sectional view of the woven fabric 1 after the first lamination process is completed, cut along line B-B of FIG. 3A.
- the width W1 of the folded woven fabric 1 is slightly greater than the width W2 of the first outer surface S 1 of the woven fabric 1 .
- This feature is advantageous and important because it allows the system 50 to compensate for slight differences between different cylindrically-woven fabrics produced by the same or different circular weaving machines. For example, it is well known that one circular weaving machine may produce cylindrically woven fabrics of slightly-different widths due to machine characteristics. In this case, the width W2 can be selected appropriately so as to compensate for these differences without exceeding the width of any cylindrically woven fabric.
- a second lamination process of the method is performed as follows.
- the woven fabric 1 as shown in FIG. 5 is basically flipped or rotated at 180° so that a second waterproof film 2 b can be applied to a second outer surface thereof, where the first and second outer surfaces S 1 and S 2 are positioned at opposite sides of the woven fabric 1 .
- the system 50 flips in a U-direction, or rotates the woven fabric 1 at 180° using any known means or technique, so that the second outer surface S 2 of the woven fabric 1 is now above the first outer surface S 1 of the woven fabric 1 .
- a second film compressor 4 b applies the second waterproof film 2 b onto the second outer surface S 2 of the woven fabric 1 using existing lamination techniques.
- the second outer surface S 2 of the woven fabric 1 has the same width W2 as the first outer surface S 1 .
- the laminated woven fabric 1 is passed between a pair of transport rollers 6 a and 6 b .
- the transport rollers 6 a and 6 b can apply pressure to the laminated waterproof film 2 b to further secure the lamination.
- the upper transport roller 6 a can include a known water-cooling or air-cooling roller for enhancing the close adherence of the second waterproof film 2 b to the second outer surface S 2 of the woven fabric 1 .
- FIG. 6 shows a cross-sectional view of the woven fabric 1 , cut along line C-C of FIG. 3A.
- the woven fabric 1 as shown in FIG. 6 has portions 11 a and 11 b that have not been laminated with any waterproof film, whereas the entire first and second outer surfaces S 1 and S 2 of the woven fabric 1 are covered with the first and second waterproof films 2 a and 2 b , respectively.
- FIG. 7 shows a cross-sectional view of the woven fabric 1 , cut along line D-D of FIG. 3A, after the woven fabric 1 is flattened in a different direction.
- the woven fabric 1 is flattened or folded in a direction perpendicular or substantially perpendicular to the existing flattening/folding direction of the woven fabric 1 of FIG. 6, such that now, the non-laminated portions 11 a and 11 b of the woven fabric 1 are placed in middle regions of the woven fabric 1 .
- the folding direction of the woven fabric 1 is changed 90 degrees from the existing folding direction of the woven fabric 1 .
- non-laminated portions 11 a and 11 b of the fabric 1 are preferred because of improved efficiency in subsequent (third and fourth) lamination processes, it is acceptable to have the non-laminated portions 11 a and 11 outside the middle regions of the fabric 1 as long as the subsequent lamination processes are modified to provide appropriate lamination to these portions 11 a and 11 b.
- the method applies third and then fourth lamination processes as follows.
- a third waterproof film 3 a is applied to a third outer surface S 3 of the woven fabric 1 using a third film compressor 4 c . That is, the third waterproof film 3 c covers the non-laminated portion 1 la of the fabric 1 as well as end portions of the first and second waterproof films 2 a and 2 b .
- the third film compressor 4 c laminates the third waterproof film 3 a onto the third outer surface S 3 according to existing lamination techniques, similarly to the first or second lamination process.
- the woven fabric 1 laminated with the third waterproof film 3 a is passed between a pair of transport rollers 5 c and 5 d .
- the transport rollers 5 c and 5 d can apply pressure to the laminated waterproof film 3 a to further secure the lamination.
- the upper transport roller 5 c can include a known water-cooling or air-cooling roller for enhancing the close adherence of the waterproof film 3 a to the third outer surface S 3 of the woven fabric 1 . This completes the third lamination process.
- FIG. 8 shows a cross-sectional view of the woven fabric 1 after the third lamination process is completed, cut along line E-E of FIG. 3B.
- the width W3 of the third outer surface S 3 of the woven fabric 1 is selected appropriately so that it covers the non-laminated portion 11 a and the end portions of the first and second waterproof films 2 a and 2 b.
- a fourth lamination process of the method is performed as follows.
- the woven fabric 1 as shown in FIG. 8 is flipped or rotated at 180° so that a fourth waterproof film 3 b can be applied to a fourth outer surface S 4 of the woven fabric 1 .
- the third and fourth outer surfaces S 3 and S 4 are at opposite sides of the woven fabric 1 .
- the system 50 flips in a U-direction or rotates the woven fabric 1 at 180° using any technique so that the fourth outer surface S 4 of the woven fabric 1 is now above the third outer surface S 3 of the woven fabric 1 .
- a fourth film compressor 4 d applies the fourth waterproof film 3 b onto the fourth outer surface S 4 of the woven fabric 1 using existing lamination techniques.
- the fourth outer surface S 4 of the woven fabric 1 has the same width W3 as the third outer surface S 3
- the fourth waterproof film 3 b covers the non-laminated portion 11 b of the woven fabric 1 as well as the end portions of the first and second waterproof films 2 a and 2 b.
- the laminated woven fabric 1 is passed between a pair of transport rollers 6 c and 6 d .
- the transport rollers 6 c and 6 d can apply pressure to the laminated waterproof film 3 b to further secure the lamination.
- the upper transport roller 6 c can include a known water-cooling or air-cooling roller for enhancing the close adherence of the fourth waterproof film 3 b to the fourth outer surface S 4 of the woven fabric 1 . This completes the fourth lamination process and the method of producing the cylindrical waterproof bag according to the present invention.
- FIG. 9 shows a cross-sectional view of the waterproof bag 10 , cut along line F-F of FIG. 3B.
- the waterproof bag 10 is completely laminated with the waterproof films 2 a , 2 b , 3 a and 3 b , and is without significant projections such as the projections 201 of conventional waterproof bags as shown in FIG. 1.
- the thickness of each of the first through fourth waterproof films 2 a , 2 b , 3 a and 3 b is about 20 microns so that the application of the third and fourth waterproof films 3 a and 3 b onto the end portions of the first and second waterproof films 2 a and 2 b would not interfere both aesthetically and functionally with the operation of the first and second waterproof films 2 a and 2 b of the waterproof bag 10 .
- the thickness of the first and second waterproof films 2 a and 2 b may be much larger than the thickness of the third and fourth waterproof films 3 a and 3 b to provide a substantially-even surface throughout the entire waterproof bag 10 .
- the thickness of each of the first through fourth waterproof films 2 a , 2 b , 3 a and 3 b can be selectively varied or be uniform to provide desired aesthetical and/or waterproofing functions.
- the resultant woven bag/fabric can be wound onto a bobbin until the next lamination process can take place, or it can be supplied directly to the next lamination process.
- the resultant woven fabric 1 can be wound unto a bobbin and then unwound therefrom for the second lamination process at an appropriate time.
- the present invention is equally applicable to forming bags of different shapes, sizes, and/or configurations. Further, the present method can be applied to form waterproof objects, other than bags.
- both the first and second lamination processes can be performed simultaneously, and/or both the third and fourth lamination processes can be performed simultaneously.
- the system 50 can be configured so that both the first and second waterproof films 2 a and 2 b , and/or both the third and fourth waterproof films 3 a and 3 b can be applied simultaneously. This can further simplify the system since the flipping or rotation of the woven fabric 1 between the first and second lamination processes and between the third and fourth lamination processes can be omitted.
- FIG. 10 is a perspective view of a cylindrical waterproof bag 30 according to another embodiment of the present invention.
- the waterproof bag 30 includes a cylindrical woven fabric 1 which is identical to the woven fabric of the bag 10 of FIG. 2, a waterproof film 21 laminated or coated to the inner surface of the cylindrical woven fabric 1 , and a photo film 20 laminated or coated to the outer surface of the cylindrical woven fabric 1 .
- the waterproof film 21 can be in a cylindrical shape to fit within the inner surface of the woven fabric 1 , or can be in other shapes to adhere to the inner surface of the woven fabric 1 .
- the waterproof film 21 can be laminated to the woven fabric 1 using existing lamination techniques or the techniques discussed in U.S. Pat. No.
- the photo film 20 contains an image, graphics, printing, or the like, and can be in a cylindrical shape or other shape suitable for adhering to the outer surface of the cylindrical woven fabric 1 .
- the photo film 20 may be unnecessary to coat or laminate the entire outer surface of the woven fabric 1 with the photo film 20 . Instead, it may be sufficient to coat or laminate only certain outer portions of the woven fabric 1 with the photo film 20 .
- the cylindrical waterproof bag 30 is made of woven fabric and not vinyl and because of the structure of the bag 30 as discussed above, it is more durable than conventional waterproof bags having printed materials, has good printing quality, and is safer to handle especially since it is without sharp projections such as the projections 201 as shown in FIG. 1.
- the present invention provides many advantages over conventional waterproof bags and methods of producing waterproof bags.
- the waterproof bag is devoid of sharp projections such as the projections 201 (FIG. 1) which often render the bag unsafe to handle.
- the aesthetics of the waterproof bag is significantly improved by providing substantially uniform outer surfaces for the waterproof bag.
- the waterproofing function of the bag is significantly improved by providing overlapping layers of waterproof films on the outer surface of a woven fabric, or by providing a waterproof film laminated to the inner surface of the woven fabric.
- the present invention provides waterproof bags with improved printing quality and durability.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Purses, Travelling Bags, Baskets, Or Suitcases (AREA)
- Laminated Bodies (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
A waterproof bag having an open base component. A water proof film is adhered to an inner surface of the base component. A photofilm is adhered to an outer surface of the base component to receive advertisements. The base component may be woven with synthetic resin yarn. More than one waterproof film may be applied to the inner surface.
Description
- The present application claims the benefit of Korean Patent Application No. 10-2000-0073299 filed on Dec. 5, 2000, and is a divisional of application No. 09/955,976, filed Sep. 20, 2001, which is herein fully incorporated by reference.
- 1.Field of the Invention
- The present invention relates to bags and a method of producing the bag and, more particularly, to cylindrical (i.e., cylindrically-shaped) waterproof bags and a method of producing the same, wherein the bags have improved aesthetics and functionality.
- 2. Description of Related Art
- Conventionally, synthetic resin yarns made of materials such as PP or PE (polyester) are weaved into cylindrical bags using circular weaving machines. These cylindrical bags are composed of yarns extending in a longitude/lengthwise direction which are intertwined with yarns extending in a latitude/widthwise direction, such as in a net. However, such cylindrical bags have gaps between these yarns, rendering them unsuitable as waterproof bags.
- To transform such bags into waterproof bags, waterproof films are applied to the outer surface of the bag. FIG. 1 illustrates an example of one such conventional cylindrical
waterproof bag 150. As shown in FIG. 1, the cylindricalwaterproof bag 150 includes a cylindricallywoven fabric 100, and twowaterproof films 200 laminated to the outer surface of thewoven fabric 100. Particularly, in the fabrication method, the cylindricallywoven fabric 100 is laid flat and wrapped around a bobbin. Then the cylindricallywoven fabric 100 is unwound from the bobbin and passed through a conventional film compressor to adhere twowaterproof films 200 on the opposite sides of the outer surface of thewoven fabric 100 to fabricate the cylindricalwaterproof bag 150. Although effective, however, there are problems associated with the cylindricalwaterproof bag 100. As shown, the cylindricalwaterproof bag 100 includes a pair ofprojections 201 that are created at the ends where the twowaterproof films 200 meet.Such projections 201 render thebag 150 less attractive and less functional. In addition, in cold weather environments, theprojections 201 either freeze or become stiff and can cut fingers when thebags 150 are handled. These problems limit the practical use of thewaterproof bags 150. - Further, cylindrical bags made of vinyl are generally used if the bags need printing on the outer surface of the bags, e.g., for advertisement purposes. However, such bags are not durable and often cannot be re-used.
- Therefore, there is a need for a waterproof bag and a method of producing the waterproof bag that can overcome the above laminations and other problems associated with conventional waterproof bags and methods of producing the waterproof bags. Particularly, a need exists for a waterproof bag with improved waterproofing functionality, aesthetics and durability.
- Accordingly, an object of the present invention is to provide a waterproof bag and a method of producing the waterproof bag, which overcome problems associated with conventional waterproof bags and conventional methods of producing the waterproof bags.
- Another object of the present invention is to provide a waterproof bag and a method of producing the same, wherein the waterproof bag has improved waterproofing functionality, improved aesthetics and improved durability with good printing quality.
- In one embodiment, the present invention is directed a method of producing a waterproof object, the method comprising the steps of first applying first and second waterproof films respectively onto first and second outer surfaces of a base component, such that the base component includes first and second non-laminated outer surface areas; refolding the base component so as to position the first and second non-laminated outer surface areas in certain regions of the base component; and second applying third and fourth waterproof films respectively onto the first and second non-laminated outer surface areas of the base component and onto first and second end portions of the first and second waterproof films.
- The present invention is also directed to a waterproof object comprising a base component having first, second, third and fourth outer surfaces; first and second waterproof films respectively disposed on the first and second outer surfaces of the base component, such that the third and fourth outer surfaces are devoid of the first and second waterproof films; and third and fourth waterproof films respectively disposed on the third and fourth outer surfaces of the base component and over first and second end portions of the first and second waterproof films.
- Furthermore, the present invention is directed to a waterproof bag comprising a woven base component; at least one waterproof film adhered to an inner surface of the base component; and a photo film adhered to an outer surface of the base component to produce the waterproof bag.
- Moreover, the present invention is directed to a system for producing a waterproof object using a base component, the system comprising a first application section for respectively applying first and second waterproof films onto first and second outer surfaces of the base component, such that the base component includes first and second non-laminated outer surface areas; a refolding section for refolding the base component so as to position the first and second non-laminated outer surface areas in certain regions of the base component; and a second application section for respectively applying third and fourth waterproof films onto the first and second non-laminated outer surface areas of the base component and onto first and second end portions of the first and second waterproof films.
- The present invention will become more fully understood from the detailed description given hereinbelow and the accompanying drawings which are given by way of illustration only, wherein reference numerals designate corresponding parts in the various drawings and wherein:
- FIG. 1 is a perspective view of a conventional cylindrical waterproof bag;
- FIG. 2 is a perspective view of a cylindrical waterproof bag according to one embodiment of the present invention;
- FIGS. 3A and 3B are diagrams of a system for producing a cylindrical waterproof bag according to one embodiment of the present invention;
- FIG. 4 is a cross-sectional view of a bag, cut along line A-A of FIG. 3A, according to one embodiment of the present invention;
- FIG. 5 is a cross-sectional view of a bag, cut along line B-B of FIG. 3A, according to one embodiment of the present invention;
- FIG. 6 is a cross-sectional view of a bag, cut along line C-C of FIG. 3A, according to one embodiment of the present invention;
- FIG. 7 is a cross-sectional view of a bag that has been refolded, cut along line D-D of FIG. 3A, according to one embodiment of the present invention;
- FIG. 8 is a cross-sectional view of a bag, cut along line E-E of FIG. 3B, according to one embodiment of the present invention;
- FIG. 9 is a cross-sectional view of a bag, cut along line F-F of FIG. 3B, according to one embodiment of the present invention; and
- FIG. 10 is a perspective view of a cylindrical waterproof bag according to another embodiment of the present invention.
- FIG. 2 is an example of a cylindrical
waterproof bag 10 according to one embodiment of the present invention. As shown in FIG. 2, the cylindricalwaterproof bag 10 includes a cylindrically woven fabric 1, first and secondwaterproof films waterproof films waterproof films waterproof films waterproof films - To provide enhanced waterproofing characteristics, the third and fourth
waterproof films waterproof films waterproof films waterproof films waterproof films waterproof films - In one embodiment, the
waterproof films cylindrical bag 10 as desired. In fact, any information and/or image may be provided on or as part of the first and secondwaterproof films waterproof films waterproof films bag 10 is greatly improved. Moreover, since the first through fourthwaterproof films waterproof bag 10 are improved significantly. - A method of producing the cylindrical
waterproof bag 10 according to one embodiment of the present invention is as follows. This method can be implemented using asystem 50 for producing cylindrical waterproof bags as shown in FIGS. 3A and 3B. In this method, first, the woven fabric 1 is provided by weaving synthetic yarns or the like using any conventional circular weaving machine or existing techniques. Then the woven fabric 1 is passed to thesystem 50 which transforms the woven fabric 1 into a waterproof bag according to the embodiments of the present invention. Prior to being processed by thesystem 50, the woven fabric 1 may be flattened, e.g., by being passed through a pair of stamp rollers. Then the flattened woven fabric 1 can be transported directly from the circular weaving machine to thesystem 50, or can be wound unto a bobbin and subsequently unwound from the bobbin and supplied to thesystem 50 at an appropriate time. The woven fabric 1 functions as a base component unto which waterproof films can be applied to produce a waterproof bag. - Referring now to FIG. 3A, the flattened woven fabric1 enters the
system 50 where FIG. 4 shows a cross-sectional view of the woven fabric 1 at this time, cut along line A-A of FIG. 3A. The flattened or folded woven fabric 1 has a width of W1. - Then a first lamination process of the method is performed. Particularly, in the first lamination process, a first
waterproof film 2 a is applied to a first outer surface S1 of the woven fabric 1 using afirst film compressor 4 a. Thefirst film compressor 4 a laminates the firstwaterproof film 2 a onto the first outer surface S1 according to existing lamination techniques. For example, the firstwaterproof film 2 a is laminated to the woven fabric 1 using T-dice. In the alternative, the firstwaterproof film 2 a may be adhered to the first outer surface S1 using other existing material adherence techniques. Then the woven fabric 1 laminated with the firstwaterproof film 2 a is passed between a pair oftransport rollers transport rollers waterproof film 2 a to further secure the lamination. In one embodiment, theupper transport roller 5 a can include a known water-cooling or air-cooling roller for enhancing the close adherence of thewaterproof film 2 a to the first outer surface S1 of the woven fabric 1. This completes the first lamination process. - FIG. 5 shows a cross-sectional view of the woven fabric1 after the first lamination process is completed, cut along line B-B of FIG. 3A. As shown in FIG. 5, the width W1 of the folded woven fabric 1 is slightly greater than the width W2 of the first outer surface S1 of the woven fabric 1. This feature is advantageous and important because it allows the
system 50 to compensate for slight differences between different cylindrically-woven fabrics produced by the same or different circular weaving machines. For example, it is well known that one circular weaving machine may produce cylindrically woven fabrics of slightly-different widths due to machine characteristics. In this case, the width W2 can be selected appropriately so as to compensate for these differences without exceeding the width of any cylindrically woven fabric. - Then, a second lamination process of the method is performed as follows. The woven fabric1 as shown in FIG. 5 is basically flipped or rotated at 180° so that a second
waterproof film 2 b can be applied to a second outer surface thereof, where the first and second outer surfaces S1 and S2 are positioned at opposite sides of the woven fabric 1. Particularly, returning to FIG. 3A, thesystem 50 flips in a U-direction, or rotates the woven fabric 1 at 180° using any known means or technique, so that the second outer surface S2 of the woven fabric 1 is now above the first outer surface S1 of the woven fabric 1. Then asecond film compressor 4 b applies the secondwaterproof film 2 b onto the second outer surface S2 of the woven fabric 1 using existing lamination techniques. The second outer surface S2 of the woven fabric 1 has the same width W2 as the first outer surface S1. Then the laminated woven fabric 1 is passed between a pair oftransport rollers 6 a and 6 b. Similarly to thetransport rollers transport rollers 6 a and 6 b can apply pressure to the laminatedwaterproof film 2 b to further secure the lamination. In one embodiment, the upper transport roller 6 a can include a known water-cooling or air-cooling roller for enhancing the close adherence of the secondwaterproof film 2 b to the second outer surface S2 of the woven fabric 1. This completes the second lamination process, and the woven fabric 1 laminated with the first and secondwaterproof films portions waterproof films - Then, the flattening/folding direction of the woven fabric1 is changed using existing techniques and/or components, e.g., guide rollers 7. FIG. 7 shows a cross-sectional view of the woven fabric 1, cut along line D-D of FIG. 3A, after the woven fabric 1 is flattened in a different direction. Particularly, as shown in FIG. 7, the woven fabric 1 is flattened or folded in a direction perpendicular or substantially perpendicular to the existing flattening/folding direction of the woven fabric 1 of FIG. 6, such that now, the
non-laminated portions - Although it is preferred to have the
non-laminated portions non-laminated portions 11 a and 11 outside the middle regions of the fabric 1 as long as the subsequent lamination processes are modified to provide appropriate lamination to theseportions - Once the flattening/folding direction of the woven fabric1 is changed as discussed above, the method applies third and then fourth lamination processes as follows. In the third lamination process, as shown in FIG. 3B, a third
waterproof film 3 a is applied to a third outer surface S3 of the woven fabric 1 using athird film compressor 4 c. That is, the third waterproof film 3 c covers the non-laminated portion 1 la of the fabric 1 as well as end portions of the first and secondwaterproof films third film compressor 4 c laminates the thirdwaterproof film 3 a onto the third outer surface S3 according to existing lamination techniques, similarly to the first or second lamination process. Then the woven fabric 1 laminated with the thirdwaterproof film 3 a is passed between a pair oftransport rollers transport rollers waterproof film 3 a to further secure the lamination. In one embodiment, theupper transport roller 5 c can include a known water-cooling or air-cooling roller for enhancing the close adherence of thewaterproof film 3 a to the third outer surface S3 of the woven fabric 1. This completes the third lamination process. - FIG. 8 shows a cross-sectional view of the woven fabric1 after the third lamination process is completed, cut along line E-E of FIG. 3B. As shown in FIG. 8, the width W3 of the third outer surface S3 of the woven fabric 1 is selected appropriately so that it covers the
non-laminated portion 11 a and the end portions of the first and secondwaterproof films - Then, a fourth lamination process of the method is performed as follows. Similarly to the flipping or rotation process discussed above, the woven fabric1 as shown in FIG. 8 is flipped or rotated at 180° so that a fourth
waterproof film 3 b can be applied to a fourth outer surface S4 of the woven fabric 1. The third and fourth outer surfaces S3 and S4 are at opposite sides of the woven fabric 1. Particularly, referring to FIG. 3B, thesystem 50 flips in a U-direction or rotates the woven fabric 1 at 180° using any technique so that the fourth outer surface S4 of the woven fabric 1 is now above the third outer surface S3 of the woven fabric 1. Then afourth film compressor 4 d applies the fourthwaterproof film 3 b onto the fourth outer surface S4 of the woven fabric 1 using existing lamination techniques. The fourth outer surface S4 of the woven fabric 1 has the same width W3 as the third outer surface S3, and the fourthwaterproof film 3 b covers thenon-laminated portion 11 b of the woven fabric 1 as well as the end portions of the first and secondwaterproof films - Then the laminated woven fabric1 is passed between a pair of
transport rollers transport rollers transport rollers waterproof film 3 b to further secure the lamination. In one embodiment, theupper transport roller 6 c can include a known water-cooling or air-cooling roller for enhancing the close adherence of the fourthwaterproof film 3 b to the fourth outer surface S4 of the woven fabric 1. This completes the fourth lamination process and the method of producing the cylindrical waterproof bag according to the present invention. As a result, the cylindricalwaterproof bag 10 is produced which is composed of the woven fabric 1 laminated with the first through fourthwaterproof films waterproof bag 10, cut along line F-F of FIG. 3B. Thewaterproof bag 10 is completely laminated with thewaterproof films projections 201 of conventional waterproof bags as shown in FIG. 1. - In one embodiment, the thickness of each of the first through fourth
waterproof films waterproof films waterproof films waterproof films waterproof bag 10. In another embodiment, the thickness of the first and secondwaterproof films waterproof films waterproof bag 10. In other embodiments, the thickness of each of the first through fourthwaterproof films - Between the first through fourth lamination processes, the resultant woven bag/fabric can be wound onto a bobbin until the next lamination process can take place, or it can be supplied directly to the next lamination process. For example, after the first lamination process is completed, the resultant woven fabric1 can be wound unto a bobbin and then unwound therefrom for the second lamination process at an appropriate time.
- Although the preferred embodiments of the present invention have been described above in connection with cylindrically-shaped waterproof bags, the present invention is equally applicable to forming bags of different shapes, sizes, and/or configurations. Further, the present method can be applied to form waterproof objects, other than bags.
- In another embodiment, both the first and second lamination processes can be performed simultaneously, and/or both the third and fourth lamination processes can be performed simultaneously. For example, the
system 50 can be configured so that both the first and secondwaterproof films waterproof films - FIG. 10 is a perspective view of a cylindrical
waterproof bag 30 according to another embodiment of the present invention. As shown in FIG. 10, thewaterproof bag 30 includes a cylindrical woven fabric 1 which is identical to the woven fabric of thebag 10 of FIG. 2, awaterproof film 21 laminated or coated to the inner surface of the cylindrical woven fabric 1, and aphoto film 20 laminated or coated to the outer surface of the cylindrical woven fabric 1. Thewaterproof film 21 can be in a cylindrical shape to fit within the inner surface of the woven fabric 1, or can be in other shapes to adhere to the inner surface of the woven fabric 1. Thewaterproof film 21 can be laminated to the woven fabric 1 using existing lamination techniques or the techniques discussed in U.S. Pat. No. 6,105,337 which is herein fully incorporated by reference. Thephoto film 20 contains an image, graphics, printing, or the like, and can be in a cylindrical shape or other shape suitable for adhering to the outer surface of the cylindrical woven fabric 1. For example, as long as the entire inner surface of the woven fabric 1 is laminated with thewaterproof film 21, rendering the entire bag waterproof, it may be unnecessary to coat or laminate the entire outer surface of the woven fabric 1 with thephoto film 20. Instead, it may be sufficient to coat or laminate only certain outer portions of the woven fabric 1 with thephoto film 20. - Because the cylindrical
waterproof bag 30 is made of woven fabric and not vinyl and because of the structure of thebag 30 as discussed above, it is more durable than conventional waterproof bags having printed materials, has good printing quality, and is safer to handle especially since it is without sharp projections such as theprojections 201 as shown in FIG. 1. - Accordingly, the present invention provides many advantages over conventional waterproof bags and methods of producing waterproof bags. For example, because of the application of four lamination processes, the waterproof bag is devoid of sharp projections such as the projections201 (FIG. 1) which often render the bag unsafe to handle. The aesthetics of the waterproof bag is significantly improved by providing substantially uniform outer surfaces for the waterproof bag. Further, the waterproofing function of the bag is significantly improved by providing overlapping layers of waterproof films on the outer surface of a woven fabric, or by providing a waterproof film laminated to the inner surface of the woven fabric. Moreover, the present invention provides waterproof bags with improved printing quality and durability.
- The invention is thus described, it will be obvious that the same may be varied in many ways, Such variations are not to be regarded as a departure from the spirit and scope of the invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims.
Claims (5)
1. A waterproof bag comprising:
a woven base component;
at least one waterproof film adhered to an inner surface of the base component; and
a photo film adhered to an outer surface of the base component to produce the waterproof bag.
2. The waterproof bag of claim 1 , wherein the base component is weaved with synthetic resin yarns.
3. The waterproof bag of claim 1 , wherein the waterproof bag has a cylindrical configuration.
4. The waterproof bag of claim 1 , wherein the waterproof film is adhered to an entire inner surface of the base component.
5. The waterproof bag of claim 4 , wherein the photo film is adhered only on certain portions of an entire outer surface of the base component.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/712,096 US20040096613A1 (en) | 2000-12-05 | 2003-11-14 | Waterproof bags |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR2000-0073299 | 2000-12-05 | ||
KR10-2000-0073299A KR100387289B1 (en) | 2000-12-05 | 2000-12-05 | Adherence structure of waterproofing and dampproofing film and laminating method thereof |
US09/955,976 US6686010B2 (en) | 2000-12-05 | 2001-09-20 | Waterproof bags and method of producing waterproof bags |
US10/712,096 US20040096613A1 (en) | 2000-12-05 | 2003-11-14 | Waterproof bags |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US09/955,976 Division US6686010B2 (en) | 2000-12-05 | 2001-09-20 | Waterproof bags and method of producing waterproof bags |
Publications (1)
Publication Number | Publication Date |
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US20040096613A1 true US20040096613A1 (en) | 2004-05-20 |
Family
ID=19702679
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
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US09/955,976 Expired - Lifetime US6686010B2 (en) | 2000-12-05 | 2001-09-20 | Waterproof bags and method of producing waterproof bags |
US10/712,096 Abandoned US20040096613A1 (en) | 2000-12-05 | 2003-11-14 | Waterproof bags |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
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US09/955,976 Expired - Lifetime US6686010B2 (en) | 2000-12-05 | 2001-09-20 | Waterproof bags and method of producing waterproof bags |
Country Status (2)
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US (2) | US6686010B2 (en) |
KR (1) | KR100387289B1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009016644A1 (en) * | 2007-07-30 | 2009-02-05 | Ashok Chaturvedi | A laminated woven bag and method of manufacturing a laminated woven bag |
TW200928810A (en) * | 2007-12-31 | 2009-07-01 | Aletheia University | Method for searching data |
CN103301990A (en) * | 2013-05-16 | 2013-09-18 | 吴江市美晟机械设备有限公司 | Tube coiling machine gluing device |
KR102048285B1 (en) * | 2015-06-17 | 2019-11-25 | 이상동 | Manufacturing method of waterproof bag and waterproof bag made by the same |
USD1023557S1 (en) * | 2020-08-20 | 2024-04-23 | Yiwu Ruili Information Technology Co., Ltd | Waterproof backpack |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1959782A (en) * | 1932-11-28 | 1934-05-22 | Jr Francis F Fenwick | Water carrier and the like |
US5874205A (en) * | 1997-05-23 | 1999-02-23 | Eastman Kodak Company | Photographic element with indicia on oriented polymer back sheet |
US6105337A (en) * | 1998-10-14 | 2000-08-22 | Ahn; Soon-Keun | System for making waterproof bags by lining bag shell with tubular film |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA2030112A1 (en) * | 1989-11-24 | 1991-05-25 | Yasuo Ito | Xanthine compound, method for preparing thereof, and a pharmaceutical composition comprising the same |
KR940004559B1 (en) * | 1991-11-26 | 1994-05-25 | 주식회사 금성사 | Adaptive luma/chroma separation for tv receiver |
JPH07112745A (en) * | 1993-10-12 | 1995-05-02 | Hitoshi Nito | Structure of sealed sub-division bag and its manufacture |
JP3756937B2 (en) * | 1997-03-26 | 2006-03-22 | 共同紙工株式会社 | LAMINATED FILM, PROCESS FOR PRODUCING THE SAME, AND PACKAGE BODY AND PACKAGING BODY USING THE SAME |
KR200201790Y1 (en) * | 2000-05-23 | 2000-11-01 | 선영민 | A manufacturing equipment of sack |
-
2000
- 2000-12-05 KR KR10-2000-0073299A patent/KR100387289B1/en active IP Right Grant
-
2001
- 2001-09-20 US US09/955,976 patent/US6686010B2/en not_active Expired - Lifetime
-
2003
- 2003-11-14 US US10/712,096 patent/US20040096613A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1959782A (en) * | 1932-11-28 | 1934-05-22 | Jr Francis F Fenwick | Water carrier and the like |
US5874205A (en) * | 1997-05-23 | 1999-02-23 | Eastman Kodak Company | Photographic element with indicia on oriented polymer back sheet |
US6105337A (en) * | 1998-10-14 | 2000-08-22 | Ahn; Soon-Keun | System for making waterproof bags by lining bag shell with tubular film |
Also Published As
Publication number | Publication date |
---|---|
KR100387289B1 (en) | 2003-06-12 |
US20020068669A1 (en) | 2002-06-06 |
US6686010B2 (en) | 2004-02-03 |
KR20020043938A (en) | 2002-06-12 |
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