Source: https://patents.google.com/patent/US9670617B2/en
Timestamp: 2019-01-16 15:25:06
Document Index: 618252034

Matched Legal Cases: ['Application No. 61', 'Application No. 61', 'Application No. 2012800076451', 'Application No. 201280007645', 'Application No. 2012800076451', 'Application No. 2012800076451', 'Application No. 12746838', 'Application No. 2013', 'Application No. 2013', 'Application No. 2013']

US9670617B2 - System and methods involving fabricating sheet products - Google Patents
System and methods involving fabricating sheet products Download PDF
US9670617B2
US9670617B2 US13359844 US201213359844A US9670617B2 US 9670617 B2 US9670617 B2 US 9670617B2 US 13359844 US13359844 US 13359844 US 201213359844 A US201213359844 A US 201213359844A US 9670617 B2 US9670617 B2 US 9670617B2
US13359844
US20120204905A1 (en )
B65H2406/15—Means using fluid made only for exhausting gaseous medium rotary pressurized means, e.g. cylinder, drum, shaft, spindle
A system for fabricating a sheet product includes a first rotatable roller assembly operative to emit a pressurized fluid through an outer surface of the first rotatable roller assembly, and a second rotatable roller assembly having an outer surface arranged proximate to the outer surface of the first rotatable roller assembly, the second rotatable roller assembly and the first rotatable roller assembly are operative to rotate in opposing directions, the second rotatable roller assembly and the first rotatable roller assembly defining a gap therebetween through which a sheet material passes in contact with the outer surface of the first rotatable roller assembly and the outer surface of the second rotatable roller assembly, the emitted pressurized fluid operative to impinge a surface of the sheet material and separate contact between the outer surface of the first rotatable roller assembly and the sheet material.
This non-provisional application is based upon U.S. Provisional Patent Application No. 61/443,013, of the same title, filed Feb. 15, 2011. The priority of U.S. Provisional Patent Application No. 61/443,013 is hereby claimed and the disclosure thereof is incorporated into this application by reference.
The subject matter disclosed herein relates to systems and methods for fabricating sheet products.
Sheet products may be fabricated using a variety of methods. In many fabrication methods, the sheet product has a high moisture content (moisture to fiber ratio) in early stages of the process. The sheet product may be dried using a variety of methods to lower the moisture content and increase the tensile strength of the sheet product.
In some fabrication processes, the sheet product may be relatively thin, resulting in a low tensile strength when the moisture content in the sheet product is high. In such processes, a textile backing cloth or fabric having a relatively high tensile strength may be mechanically bonded to or in contact with the moist sheet product. The use of the textile backing cloth contacting the moist sheet product allows the moist sheet product to undergo a variety of mechanical and chemical automated processes that include, for example, exerting tension with rollers or other mechanical devices while avoiding damaging or tearing the moist sheet product.
According to one aspect of the invention, a system for fabricating a sheet product includes a first rotatable roller assembly operative to emit a pressurized fluid through an outer surface of the first rotatable roller assembly, and a second rotatable roller assembly having an outer surface arranged proximate to the outer surface of the first rotatable roller assembly, the second rotatable roller assembly and the first rotatable roller assembly are operative to rotate in opposing directions, the second rotatable roller assembly and the first rotatable roller assembly defining a gap therebetween through which a sheet material passes in contact with the outer surface of the first rotatable roller assembly and the outer surface of the second rotatable roller assembly, the emitted pressurized fluid operative to impinge a surface of the sheet material and separate contact between the outer surface of the first rotatable roller assembly and the sheet material.
According to another aspect of the invention, a system for fabricating a sheet product includes a first rotatable roller assembly operative to emit a pressurized fluid through an outer surface of the first rotatable roller assembly, and a second rotatable roller assembly having an outer surface arranged proximate to the outer surface of the first rotatable roller assembly, the second rotatable roller assembly and the first rotatable roller assembly are operative to rotate in opposing directions, the second rotatable roller assembly and the first rotatable roller assembly defining a gap therebetween through which a sheet material having a first surface including a sheet product and a second surface including a fabric portion passes, the fabric portion in contact with the outer surface of the first rotatable roller assembly and the sheet product in contact with the outer surface of the second rotatable roller assembly, the emitted pressurized fluid operative to impinge a surface of the sheet material and separate contact between the fabric portion and the sheet product.
According to yet another aspect of the invention, a method for fabricating a sheet product includes rotating a first roller assembly in a first direction, rotating a second roller assembly in a second direction, the second direction opposing the first direction, passing a sheet material in contact with an outer surface of the first roller assembly and an outer surface of the second roller assembly through a gap defined by the outer surface of the first roller assembly and the outer surface of the second roller assembly, and emitting a stream of pressurized fluid through the outer surface of the first roller assembly such that the stream of pressurized fluid impinges on the sheet material and imparts a force on the sheet material.
FIG. 1A illustrates side view of an exemplary embodiment of a system in accordance with an embodiment of the invention.
FIG. 1B illustrates side view of an alternate exemplary embodiment of a system in accordance with an embodiment of the invention.
FIG. 2 illustrates a perspective view of a portion of an exemplary embodiment of the first roller assembly of the system of FIG. 1A.
FIG. 3 illustrates a perspective, partially cut-away view of an exemplary embodiment of the first roller assembly of FIG. 2.
FIG. 4 illustrates a front view of the fluid emission portion of the first roller assembly of FIG. 2.
FIG. 5 illustrates a cross-sectional view of the fluid emission portion along the line 5-5 of FIG. 4.
FIG. 6 illustrates an alternate exemplary embodiment of a system.
FIG. 7 illustrates a detailed view of an exemplary arrangement of the sheet product and the fabric of FIG. 6.
FIG. 8 illustrates another alternate exemplary embodiment of a system.
Sheet products are often fabricated with systems that include a variety of rollers and drums that move and direct a sheet product through paths of various fabrication stages. The transition of a sheet product from contacting one roller or drum to another through a fabrication path is complicated by, for example, the thickness, moisture content, and tensile strength of the sheet product; each of which may change as the sheet product moves through the fabrication stages. Thus, a method and system that improves the transition of a sheet product from contacting different surfaces in a fabrication path is desired.
The term “sheet products” as used herein is inclusive of natural and/or synthetic cloth or paper sheets. Sheet products may include both woven and non-woven articles. There are a wide variety of nonwoven manufacturing processes and they can be either wetlaid or drylaid. Some examples include hydroentagled (sometimes called spunlace), DRC (double re-creped), airlaid, spunbond, carded, paper towel, and meltblown sheet products. Further, sheet products may contain fibrous cellulosic materials that may be derived from natural sources, such as wood pulp fibers, as well as other fibrous material characterized by having hydroxyl groups attached to the polymer backbone. These include glass fibers and synthetic fibers modified with hydroxyl groups. Examples of sheet products include, but are not limited to, wipers, napkins, tissues, rolls, towels or other fibrous, film, polymer, or filamentary products.
FIG. 1A illustrates an exemplary embodiment of a system 100. The system 100 may, for example, in some embodiments, be a portion of a sub-system of a larger fabrication system. In this regard, the system 100 includes a first roller assembly 102 (shown partially cut-away) that cooperatively engages a second roller assembly 104, and a pressurized fluid source 105 such as, for example, a compressed air, gas, or another type of pressurized fluid. In an embodiment, the system 100 includes a directing assembly 106 and a drive roller assembly 108.
In operation, a sheet product 101 moves as a continuous sheet through the system 100. The sheet product 101 contacts the rotating first roller assembly 102 that rotates about an axis of rotation 113 and passes between a gap 115 defined by the first roller assembly 102 and the second roller assembly 104. The sheet product 101 contacts the rotating second roller assembly 104 that rotates about an axis of rotation 117, and travels in contact with the second roller assembly 104 through the gap 115. In the illustrated embodiment, the first roller assembly 102 and the second roller assembly 104 rotate in opposing directions as indicated by the arrows 103 and 107. The first roller assembly 102 includes one or more stationary ports 110 communicative with the pressurized fluid source 105. The ports 110 are operative to emit a pressurized fluid indicated by the arrow 111, such as, for example, compressed air, gas, or steam having a flow path indicated by the arrows 111. The pressurized fluid is operative to exert a force on the sheet product 101 that biases the sheet product 101 away from an outer surface of the first roller assembly 102 and towards the outer surface of the second roller assembly 104 in a region proximate to the gap 115 defined by the first roller assembly 102 and the second roller assembly 104. The gap 115 defined by the first roller assembly 102 and the second roller assembly 104 is sized such that a compressive force may be exerted on the sheet product 101. The compressive force exerted on the sheet product 101 by the first roller assembly 102 and the second roller assembly 104 and the biasing force exerted by the pressurized fluid assist in overcoming mechanical forces such as, for example, surface tension or adhesion between the first roller assembly 102 and the sheet product 101. (Additional forces may be exerted on the sheet product 101 to assist in separating the sheet product 101 from the first roller assembly such as, for example, an adhesive force exerted by the outer surface of the second roller assembly 104 and/or a tensile force exerted on the sheet product 101 by the rotation of the second roller assembly 104.) Once the sheet product 101 is separated from the first roller assembly 102 and contacts the second roller assembly 104, the sheet product 101 rotates about the axis of rotation of the second roller assembly 104 (The second roller assembly 104 may be used to, for example, assist in removing moisture from the sheet product 101). The directing assembly 106 includes, for example, a metallic strip or other suitable mechanical device that assists in separating the sheet product 101 from contacting the second roller assembly 104. In the illustrated embodiment, the drive roller assembly 108 includes a pair of rollers in contact with the sheet product 101. The drive roller assembly 108 rollers rotate and exert a tensile and compressive force on the sheet product 101 that pulls the sheet product through the drive roller assembly 108.
FIG. 1B illustrates an alternate exemplary embodiment of a system similar to the system 100 (of FIG. 1A) described above. In this regard, the illustrated embodiment includes a blade assembly 120. The blade assembly 120 may be formed from, for example, a metallic, ceramic, or plastic material. In operation, the blade assembly 120 may contact the second roller assembly 104 and exert a force that assists in mechanically releasing the sheet product 101 from the second roller assembly 104.
FIG. 2 illustrates a perspective view of a portion of an exemplary embodiment of the first roller assembly 102. The first roller assembly 102 includes a drum portion 202 that in an embodiment is tubular in shape and includes a plurality of ports 204 that are communicative with the outer surface 206 of the drum portion 202 and the inner surface 208 of the drum portion 202. In an embodiment, the drum portion 202 is driven to rotate about a rotational axis 201 by, for example, a mechanical linkage and driving assembly 203. The first roller assembly 102 includes a fluid emission portion 210. The fluid emission portion 210 is disposed in an inner cavity partially defined by the inner surface 208 of the drum portion 202 and remains substantially stationary relative to the rotation of the drum portion 202. The fluid emission portion 210 and the drum portion 202 may be mechanically connected by, for example, bearings, bushings, or another similar mechanical arrangement that allows the drum portion 202 to rotate about the fluid emission portion 210. The fluid emission portion 210 includes one or more ports (described below) communicative with an orifice 212, that are operative to receive a pressurized fluid such as, for example, air from the pressurized fluid source 105 and emit the pressurized fluid from the ports such that the pressurized fluid passes through the plurality of ports 204 in the drum portion 202. The pressurized fluid impinges the sheet product 101 and imparts a force on the sheet product 101 (described above in FIG. 1A). The fluid emission portion 210 emits a stream of pressurized fluid at a constant angle relative to the arrangement of the second roller assembly 104.
FIG. 3 illustrates a perspective, partially cut-away view of an exemplary embodiment of the first roller assembly 102. The fluid emission portion 210 includes a port 302 that is communicative with the orifice 212 and the pressurized fluid source 105. The port 302 may be similar to the port 110 (of FIG. 1) described above. A seal 305 may be arranged proximate to the orifice 212 that is operative to direct the emitted fluid in a flow path that impinges a portion of the drum portion 202. The seal 305 may contact the inner surface of the drum portion 202 and may include for example, a ceramic, metallic, or flexible plastic material.
FIG. 4 illustrates a front view of the fluid emission portion 210. The illustrated embodiment includes the port 302 arranged as a slot or channel in the fluid emission portion 210. FIG. 5 illustrates a cross-sectional view of the fluid emission portion 210 along the line 5-5 of FIG. 4.
FIG. 6 illustrates an alternate exemplary embodiment of a system 700. The system 700 includes a first roller assembly 102 (shown partially cut-away) and a second roller assembly 104. The sheet product 101 is attached (or, in contact with) a fabric 701 (the sheet product 101 attached (or in contact with) the fabric 701 may each collectively or individually define a sheet material 703), which acts as a relatively high tensile strength backing for the sheet product 101.
FIG. 7 illustrates an exemplary embodiment of the arrangement of the sheet product 101 and the fabric 701. The fabric 701 includes, for example, a woven or mesh textile material having porosity sufficient to allow at least a portion of the pressurized air to permeate through the fabric 701. The fabric 701 is shown for illustrative purposes as having a uniform profile. Alternate embodiments of the fabric 701 may include, for example a fabric 701 having an undulating or contoured surface that contacts the sheet product 101. The contoured surface of the fabric 701 may be used to form a sheet product 101 having a textured surface or profile. Referring to FIG. 6, the system 700 may include an adhesive spray assembly 704 that receives pressurized liquid adhesive from an adhesive source 706. In operation, the fabric 701 and the sheet product 101 travel in continuous sheets through the system 700. The system 700 is operative to separate the fabric 701 from the sheet product 101 and remove moisture from the sheet product 101. In this regard, the adhesive spray assembly 704 sprays an adhesive on an outer surface 803 of the second roller assembly 104 that forms a tacky adhesive film on the second roller assembly 104. The second roller assembly 104 may be heated by, for example, a heat source or element 705 that may include steam, heated gas, convective, or microwave arrangements. The heated second roller assembly 104 is operative to remove moisture from the sheet product 101 as the sheet product 101 rotates with the second roller assembly 104. A hood portion 602 may be arranged over the second roller assembly 104. The hood portion 602 may receive hot gas such as, for example, air from a heat source 604. The hot gas is operative to heat the sheet product 101.
Referring to FIG. 7, as the drum portion 202 of the first roller assembly 102 rotates, a surface of the fabric 701 contacts the first roller assembly 102. The rotation of the drum portion 202 draws the fabric 701 and the sheet product 101 into the gap 115 having a width (x) defined by the drum portion 202 and the second roller assembly 104. The surface 805 of the sheet product 101 contacts the outer surface 803 of the second roller assembly 104. The drum portion 202 and the second roller assembly 104 exert a compressive force on the sheet product 101. Pressurized fluid having a flow path indicated by the arrows 111 is emitted from the port(s) 302 (FIG. 3) of the fluid emission portion 210. The pressurized fluid passes through the fabric 701 and impinges the sheet product 101 exerting a force on the sheet product 101 in the direction of the arrow 810 towards the second roller assembly 104 that assists in separating the fabric 701 from the sheet product 101. The fabric 701 is pulled at an angle away from the sheet product 101 by the rotation of the drum portion 202 while the force exerted by the rotation of the second roller assembly 104 assists in the separation of the sheet product 101 from the fabric 701.
As described above, a number of forces are used to separate the fabric 701 from the sheet product 101 and to assist in the adherence of the sheet product to the second roller assembly 104. A mechanical force is exerted by the arrangement of the fabric 701 that draws the fabric 701 away from the sheet product 101 as the drum portion 202 rotates. The compressive force exerted by the drum portion 202 and the second roller assembly 104 on the sheet product 101 facilitates the adhesion of the sheet product 101 to the outer surface 803 of the second roller assembly 104. The adhesive film applied to the outer surface 803 of the second roller assembly 104 assists in maintaining contact between the sheet product 101 and the second roller assembly 104. The pressurized air, emitted from the fluid emission portion 210, passing through the fabric 701, and impinging on the sheet product 101, further assists in adhering the sheet product 101 to the second roller assembly 104. The force of the pressurized air increases the force exerted in the direction of the arrow 801 and allows for comparatively less adhesive and/or surface area to be applied to the outer surface 803 of the second roller assembly 104. Following the adhesion of the sheet product 101 to the second roller assembly 104, moisture may be removed from the sheet product 101 by, for example, heating the second roller assembly 104 resulting in a reduction in the moisture content of the sheet product 101. The sheet product 101 is separated from the second roller assembly 104 following the drying process and may enter subsequent fabrications processes such as, for example additional drying processes, texturizing processes, and eventual packaging processes.
FIG. 8 illustrates an alternate embodiment of a system similar to the illustrated embodiment of FIG. 6 described above. The illustrated embodiment includes a blade assembly 120 similar to the blade assembly described above in FIG. 1B.
1. A system for fabricating a sheet product, the system comprising:
(A) a pressurized fluid source;
(B) a first rotatable roller including:
(a) a tubular rotatable drum portion having (i) a first end and a second end, and (ii) an outer surface and an inner surface, the outer surface rotating about a rotational axis in a first direction and configured to convey a sheet product that has a first surface and a second surface, the first surface of the sheet product being in contact with a portion of the outer surface of the tubular rotatable drum portion, the inner surface defining a cavity within the tubular rotatable drum portion, and the tubular rotatable drum portion further having a plurality of ports communicative between the inner surface and the outer surface, the plurality of ports extending (i) from the first end to the second end of the tubular rotatable drum portion, and (ii) around the entirety of the outer surface of the tubular rotatable drum portion; and
(b) a fluid emission portion disposed in the cavity, the fluid emission portion having (i) an orifice operative to receive a pressurized fluid from the pressurized fluid source and (ii) a stationary port connected to the orifice and operative to emit the pressurized fluid through the plurality of ports of the tubular rotatable drum portion, the stationary port being arranged as an elongated slot in the fluid emission portion that extends (i) in a direction parallel to the rotational axis of the tubular rotatable drum portion, and (ii) from the first end to the second end of the tubular rotatable drum portion;
(C) a second rotatable roller having (i) an outer surface arranged proximate to the outer surface of the tubular rotatable drum portion of the first rotatable roller, and (ii) a heat source portion configured to output steam and to heat the second rotatable roller to dry the sheet product, the second rotatable roller being operative to rotate in a second direction that is opposite to the first direction; and
(D) a gap defined between the second rotatable roller and the first rotatable roller through which the sheet product is allowed to pass,
wherein the stationary port is configured to emit the pressurized fluid (i) as a stream in a region proximate to the gap, (ii) at a constant angle relative to the second roller, (iii) to impinge on the first surface of the sheet product in the gap, (iv) to separate contact between the outer surface of the first rotatable roller and the sheet product, and (v) to transfer the sheet product from the first rotatable roller to the second rotatable roller, with the second surface of the sheet product being in contact with the outer surface of the second rotatable roller, and
wherein the first rotatable roller is configured to only emit the pressurized fluid through the plurality of ports extending (i) from the first end to the second end of the tubular rotatable drum portion, and (ii) around the entirety of the outer surface of the tubular rotatable drum portion.
2. The system of claim 1, wherein the pressurized fluid includes air.
3. The system of claim 1, wherein the first rotatable roller and the second rotatable roller are disposed and configured to impart a compressive force on the sheet product that is allowed to pass through the gap.
4. The system of claim 1, wherein the stationary port defines a flow path of the pressurized fluid in a region partially between the fluid emission portion and the tubular rotatable drum portion.
5. The system of claim 1, further including an adhesive spray assembly operative to spray an adhesive on an exposed portion of the outer surface of the second rotatable roller.
6. A method of fabricating a sheet product, the method comprising:
(A) rotating a tubular rotatable drum portion of a first roller in a first direction about a rotational axis, the tubular rotatable drum portion having (i) a first end and a second end, and (ii) an outer surface and an inner surface, the inner surface defining a cavity within the tubular rotatable drum portion, and the tubular rotatable drum portion including a plurality of ports communicative between the inner surface and an inner surface of the outer surface, the plurality of ports extending (i) from the first end to the second end of the tubular rotatable drum portion, and (ii) around the entirety of the outer surface of the tubular rotatable drum portion;
(B) rotating a second roller in a second direction, the second direction being opposite to the first direction, the second roller having an outer surface;
(C) conveying a sheet product, the sheet product having a first surface and a second surface, and the sheet product being conveyed with the first surface of the sheet product in contact with a portion of the outer surface of the tubular rotatable drum portion of the first roller;
(D) passing the sheet product, through a gap defined between the outer surface of the first roller and the outer surface of the second roller;
(E) supplying a pressurized fluid from a pressurized fluid source to a fluid emission portion disposed in the cavity of the first roller, the pressurized fluid being supplied to an orifice of the fluid emission portion;
(F) emitting a stream of pressurized fluid from a stationary port of the fluid emission portion of the first roller through the plurality of ports of the tubular rotatable drum portion of the first roller, such that the stream of pressurized fluid (i) is emitted in a region proximate to the gap, (ii) is emitted at a constant angle relative to the second roller, (iii) impinges on the first surface of the sheet product in the gap, (iv) imparts a force on the sheet product to separate contact of the sheet product from the outer surface of the first roller, and (v) transfers the sheet product from the first roller to the second roller, with the second surface of the sheet product being in contact with the outer surface of the second roller, the stationary port being connected to the orifice and arranged as an elongated slot in the fluid emission portion that extends (i) in a direction parallel to the rotational axis of the tubular rotatable drum portion, and (ii) from the first end to the second end of the tubular rotatable drum portion; and
(G) heating the second roller with steam to dry the sheet product,
wherein the first roller is configured to only emit the pressurized fluid through the plurality of ports extending (i) from the first end to the second end of the tubular rotatable drum portion, and (ii) around the entirety of the outer surface of the tubular rotatable drum portion.
7. The method of claim 6, wherein the pressurized fluid includes air.
8. The method of claim 6, further comprising imparting a compressive force on the sheet product when the sheet product is passed through the gap.
9. The method of claim 8, wherein the compressive force is imparted by the first rotatable roller and the second rotatable roller.
10. The method of claim 6, further comprising spraying an adhesive on an exposed portion of the outer surface of the second rotatable roller.
11. The system of claim 5, wherein the adhesive spray assembly is positioned upstream of the gap in a rotation direction of the second rotatable roller.
12. The system of claim 11, wherein the adhesive is operative to adhere the second surface of the sheet product to the outer surface of the second rotatable roller.
13. The method of claim 10, further comprising adhering the second surface of the sheet product to the outer surface of the second rotatable roller with the adhesive.
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US201161443013 true 2011-02-15 2011-02-15
US13359844 US9670617B2 (en) 2011-02-15 2012-01-27 System and methods involving fabricating sheet products
EP20120746838 EP2675950A4 (en) 2011-02-15 2012-01-31 System and methods involving fabricating sheet products
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CN 201280007645 CN103348060A (en) 2011-02-15 2012-01-31 System and methods involving fabricating sheet products
CA 2824363 CA2824363A1 (en) 2011-02-15 2012-01-31 System and methods involving fabricating sheet products
JP2013553460A JP6054887B2 (en) 2011-02-15 2012-01-31 System and method for manufacturing a sheet-shaped product
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US15582869 US20170234617A1 (en) 2011-02-15 2017-05-01 System and methods involving fabricating sheet products
US15582869 Continuation US20170234617A1 (en) 2011-02-15 2017-05-01 System and methods involving fabricating sheet products
US20120204905A1 true US20120204905A1 (en) 2012-08-16
US9670617B2 true US9670617B2 (en) 2017-06-06
ID=46635957
US13359844 Active 2034-08-18 US9670617B2 (en) 2011-02-15 2012-01-27 System and methods involving fabricating sheet products
US15582869 Pending US20170234617A1 (en) 2011-02-15 2017-05-01 System and methods involving fabricating sheet products
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CN (1) CN103348060A (en)
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Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CHOU, HUNG LIANG;REEL/FRAME:027614/0808