Method for inflating airbags

Abstract

A system and method for inflating airbags includes a series of pulleys arranged in two parallel rows. Each pulley has its periphery defined as a semicircular concave groove that extends between two edges, wherein the semicircular concave grooves form a tunnel. Each pulley in the first row can rotate clockwise, while each pulley in the second row rotates anticlockwise. A cylindrical air tube can be positioned in the tunnel wherein the air tube is connected to a compressed air source at an end. The air tube has spaced apertures along its length and an airbag with two flaps can be mounted on the inflation system, wherein the two flaps are pressed over the air tube by the pair of pulleys and each pair of pulleys can drag the flaps on the air tube.

Claims

1. A method for inflating an airbag, the method comprising: providing an inflation system, the inflation system comprising: a plurality of pair of pulleys arranged in two parallel rows, each pair of pulleys comprises: a first pulley and a second pulley, wherein the first pulley is positioned in the first row and the second pulley is positioned in the second row, each of the first pulley and the second pulley having its periphery configured as a semicircular concave groove that extends between two edges, each pulley of the plurality of pair of pulleys connected to an electrical source for rotating the pulleys and a control unit for regulating the speed of rotation, wherein each pulley in the first row rotates clockwise, and each pulley in the second row rotates anticlockwise, each pulley of the plurality of pair of pulleys rotates at the same speed, an elongated cylindrical air tube having a proximal end and a distal end, the proximal end of the air tube is closed, the distal end is in fluid communication with a compressed air source, the air tube rigidly positioned between the first row and the second row, the air tube has a plurality of spaced apertures at its bottom: providing an airbag, the airbag comprising: a first wall and a second wall, a first flap that extends from the first wall and a second flap that extends from the second wall, the first flap and the second flap face each other, the first wall and the second wall form a space configured to receive an article for storage, wherein the first flap and the second flap are configured to be sealed to close an opening of the airbag, each of the first wall and the second wall having a series of inflatable tubes arranged side-by-side and perpendicular to a length of the first flap or the second flap, each inflatable tube having an opening adjacent to the first flap or the second flap, the opening of each inflatable tube interrupted by a one-way valve, wherein the one-way valve is configured to allow air to enter the inflatable tube; putting the first flap and the second flap around the proximal end of the air tube, such that the air tube is sandwiched between the first flap and the second flap, wherein the first flap and the second flap are not bonded to each other and can move relative to each other; upon putting, bringing an end of the first flap and the second flap in contact with one of the pair of pulleys that is adjacent to the proximal end of the air tube, upon bringing, rotating each pair of pulleys to drag the first flap and the second flap on the air tube towards the distal end of the air tube.

2. The method according to claim 1, wherein the first pulley and the second pulley of the pair of pulleys form a tunnel into which the air tube is positioned.

3. The method according to claim 2, wherein the radius of the air tube is proportional to a radius of the semicircular concave groove of the pulleys.

4. The method according to claim 1, wherein air from the apertures of the air tube is filled into the series of inflatable tubes while the airbag is dragged on the air tube.

5. The method according to claim 4, wherein the method further comprises the steps of: upon inflating, receiving the article through the opening into the space; and upon receiving the article, heat sealing the first flap and the second flap.

6. The method according to claim 1, wherein a speed of rotation of the pulleys is proportional to a length of the air tube and volume of an inflatable tube.

7. The method according to claim 1, wherein the first row and the second row are parallel to the length of the air tube.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The accompanying figures, which are incorporated herein, form part of the specification and illustrate embodiments of the present invention. Together with the description, the figures further explain the principles of the present invention and to enable a person skilled in the relevant arts to make and use the invention.

(2) FIG. 1 is a perspective view of an airbag, according to an exemplary embodiment of the present invention.

(3) FIG. 2 is a perspective view of an inflation system and the airbag mounted on the inflation system, according to an exemplary embodiment of the present invention.

(4) FIG. 3 shows a front portion of the inflation system of FIG. 2, according to an exemplary embodiment of the present invention.

(5) FIG. 4 shows another view of the inflation system of FIG. 2, according to an exemplary embodiment of the present invention.

(6) FIG. 5 shows another view of the inflation system of FIG. 2, according to an exemplary embodiment of the present invention.

(7) FIG. 6 is a front view of the inflation system of FIG. 2, according to an exemplary embodiment of the present invention.

(8) FIG. 7 is a top view of the inflation system of FIG. 2, according to an exemplary embodiment of the present invention.

DETAILED DESCRIPTION

(9) Subject matter will now be described more fully hereinafter with reference to the accompanying drawings, which form a part hereof, and which show, by way of illustration, specific exemplary embodiments. Subject matter may, however, be embodied in a variety of different forms and, therefore, covered or claimed subject matter is intended to be construed as not being limited to any exemplary embodiments set forth herein; exemplary embodiments are provided merely to be illustrative. Likewise, the reasonably broad scope for claimed or covered subject matter is intended. Among other things, for example, the subject matter may be embodied as methods, devices, components, or systems. The following detailed description is, therefore, not intended to be taken in a limiting sense.

(10) The word “exemplary” is used herein to mean “serving as an example, instance, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments. Likewise, the term “embodiments of the present invention” does not require that all embodiments of the invention include the discussed feature, advantage, or mode of operation.

(11) The terminology used herein is to describe specific embodiments only and is not intended to be limiting of embodiments of the invention. As used herein, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context indicates otherwise. It will be further understood that the terms “comprises”, “comprising,”, “includes” and/or “including”, when used herein, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

(12) The following detailed description includes the best currently contemplated mode or modes of carrying out exemplary embodiments of the invention. The description is not to be taken in a limiting sense but is made merely to illustrate the general principles of the invention since the scope of the invention will be best defined by the allowed claims of any resulting patent.

(13) Disclosed are an airbag, an inflation system, and a method for inflating the disclosed airbag using the disclosed inflation system. Referring to FIG. 1 that shows an exemplary embodiment of the disclosed airbag. The airbag 100 is an inflatable airbag having a first wall 105 and an opposite rear wall (not shown). The front and rear walls can be bonded at three edges forming an enclosed body. The top edge of the enclosed body can be open forming a mouth or opening of the bag for receiving an item. A series of such bags can be manufactured as a continuous roll or a stack of fan-folded sheets. Each airbag in a continuous series of the airbags can be referred hereinafter as a unit. Each unit in the continuous series roll or stack of sheets can be divided by a line of weakness, such as a unit can be torn from the continuous roll along the line of weakness. In one case, the line of weakness can be spaced perforations.

(14) Flaps extend from an edge of the front wall and the rear wall, the edge forming the opening of the airbag. FIG. 1 shows a first flap 115 that extends from the front wall 105. Similarly, a second flap extends from the rear wall 110. Both the first flap and the second flap face each other and can overlap, wherein the two flaps can be bonded to close the opening of the bag. For example, the first flap and the second flap can be heat sealed after storing an article in the airbag. Each the front wall and the rear wall can include a series of inflatable tubes 120 of prolonged cylindrical configurations that are arranged side by side and perpendicular to the length of the flaps. Each inflatable tube can have an opening, preferably at its end. Each inflation tube can end up to the flap and thereafter the opening of the tube can be configured as an inflation port. For example, the opening can be in the form of a slit or aperture through which air under pressure can be drawn into the series of air tubes resulting in their inflation. The opening of each inflation tube can be interrupted by a check valve. The check valve also known as one-way-valve can be configured at the opening of the inflatable tubes that allows air to enter into the tubes but does not allow the filled air from the tubes to leak out through the opening. The use of a check valve is advantageous in prolonging the life of the airbag and limiting the spread of any damage to the functional portion of the airbag. This is because any leaked tube will not cause the deflation of the whole airbag. Thus, one or two damaged tubes will not deflate the undamaged portion of the airbag. FIG. 1 shows an opening 125 of the inflation tube, wherein a portion 130 of the opening extends up to the flap 135. The passage 140 is formed when the two flaps i.e. the first flap and the second flap are pressed against an air tube (shown in FIG. 2). The terminating portion 145 of the flaps can be heat sealed to close the opening of the airbag.

(15) Referring to FIGS. 2-7 show an exemplary embodiment of the disclosed inflation system. The inflation system 200 includes two platforms positioned side by side and separated by a small distance. FIG. 2 shows a prolonged first platform 205 and a second platform 210 located side-by-side. The inflation system 200 further includes a series of a pair of pulleys 220 installed in two parallel and spaced rows. The first row of the two rows is on the first platform and the second row is on the second platform. One pulley of the pair of pulleys 220 can be a part of the first row while the second pulley of the pair of pulleys 220 can a part of the second row, wherein the first row and the second row are closely spaced such as the adjacent pulleys in the two rows almost touch each other. The two pulleys of the pair of pulleys 220 rotate in opposite directions but at the same speed. All the pulleys on the first row rotate in the same direction and at the same speed. Similarly, all the pulleys on the second row rotate in the same direction and at the same speed, where the pulleys on the second row rotate in a direction opposite the pulleys on the first row. For example, the pulley in the first row rotates clockwise while the pulley in the second row rotates anticlockwise. All the pulleys on the first platform and the second platform rotate at the same speed. For rotating the pulleys, an electrical/mechanical source, such as a motor assembly 225 can be provided. Moreover, each pulley can be connected to a control unit for controlling the speed of the rotation of the pulleys and rotating all the pulleys at the same speed.

(16) Referring to FIG. 3, each pulley is having a body and a terminating periphery. The periphery can be configured as a semicircular concave groove 230 that extends between two opposite edges 235. Also shown in FIG. 7, the two pulleys in the pair of pulleys 220 can be located such as the two edges of the first pulley touch the two edges of the second pulley. The two pulleys of the pair of pulleys form a tunnel that can receive the air tube 240. The radius of the semicircular concave groove can be proportional to the radius of the air tube 240.

(17) The air tube is 240 is of a prolonged cylindrical configuration that can be positioned in the tunnel formed by the pair of pulleys 220. The air tube has a proximal end and a distal end, wherein the distal end of the air tube 240 can be in fluid communication with a compressed air source that can deliver air under pressure. The compressed air source may also allow adjusting the pressure of the compressed air. For example, an air compressor can be used to provide air under pressure into the air tube. The proximal end of the air tube 240 can be closed by a cap. The air tube 240 can have a plurality of spaced apertures at its bottom and pointing in a downward direction. The air under pressure from the air compressor blows through these apertures into inflation channels 120 of the airbag 100.

(18) FIGS. 2-7 also shows the airbag 100 mounted on the inflation system 200. The two flaps of the airbag 100 can be overlaid on the air tube 240 near its proximal end, such as the air tube 240 is sandwiched between the first flap and the second flap. The two flaps form a circular passage 140 around the air tube 240, shown in FIG. 1. Thereafter, the beginning or ends of the flaps can be moved towards the first pair of pulleys in the series. Once the flaps contact the pair of pulleys, the rotating pulley can drag the airbag towards the distal end of the air tube 240. The pulleys can rotate in a direction in which the airbag has to be moved over the air tube 240 i.e. towards the distal end of the air tube 240. FIG. 6 shows the two platforms i.e. the first platform 205 and the second platform 210 separated by a small distance that allows the inflated bag 100 to pass through. The two pulleys i.e. the first pulley 245 and the second pulley 250 of the pair of pulleys 220 almost touch each other. The pair of pulleys 220 snugly presses the flap 135 on the air tube 240, such that the rotation of the pulleys can frictionally drag the flap 135 over the air tube 240. As the airbag 100 moves over the air tube 240, the apertures of the air tube 240 that points to the opening of the airbag 100, blows air into the openings of the air channels 120. The air under pressure can inflate the air channels while the check valve prevents the air from leaking out of the openings.

(19) In one case, the pulleys of the inflation system 200 can rotate continuously moving the airbag 100 towards the end of the air tube 240. The apertures can be provided along the length of the air tube 240 such that the airbag can be filled while moving forward. Factors, such as the length of the air tube, pressure of the compressed air, and rotation speed of the pulleys can determine the volume of air received in each air tube 120 of the airbag 100. For example, each air tube travels a path during which it receives air, wherein the length of the path is proportional to the length of the air tube. If the pulleys rotate at a higher speed, the air tube will cover the path in lesser duration, thus receiving lesser air. And if the pulleys are rotated at a slower speed, the tube will travel the path in more time, and thus receiving more air. Therefore, the factors including the length of the air tube, the pressure of the compressed air, and the rotation speed of the pulleys can be adjusted according to the volume of the air tubes. The airbag once inflated and having an article for storing, the flaps can be heat sealed and the airbag can be labeled. The inflation system can also be operably coupled to the sealing and labeling equipment, thus automating the packaging process.

(20) While the foregoing written description of the invention enables one of ordinary skill to make and use what is considered presently to be the best mode thereof, those of ordinary skill will understand and appreciate the existence of variations, combinations, and equivalents of the specific embodiment, method, and examples herein. The invention should therefore not be limited by the above-described embodiment, method, and examples, but by all embodiments and methods within the scope and spirit of the invention as claimed.