Patents by Inventor Johan Wahlstrom

Johan Wahlstrom has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 7674949
    Abstract: absorbent article comprising a liquid transfer layer (5) positioned between a liquid pervious bodyside liner (6) and an absorbent core (2). The liner (6) comprises a plurality of perforations (7). The liner and the transfer layer are bonded together in a plurality of bonding sites (11) covering an area of between 0.5% and 11% of the area of the liner (6) that is circumscribed by the bonding sites and wherein each bonding site has an area of no more than 13 mm2. The combined perforated liner (6) and transfer layer (5) provides a quick inlet of liquid and a low rewet against the wearer. The liner (6) has a three-dimensional structure of alternating raised and depressed regions and the perforations (7) are present in the bottoms of the depressions (8) of said liner as seen from the body facing side of the liner.
    Type: Grant
    Filed: March 3, 2006
    Date of Patent: March 9, 2010
    Assignee: SCA Hygiene Products AB
    Inventors: Johan Wahlstrom, Bror-Inge Helmfridsson, Ken Olsson, Patrik Andersson, Anne Farbrot
  • Publication number: 20090082744
    Abstract: An absorbent product, such as an incontinence pad, a sanitary towel, a panty liner or the like, having a liquid-permeable top layer, a preferably liquid-impermeable bottom layer and an absorbent core arranged between the top layer and the bottom layer. The top layer is joined together with a subjacent admission material by means of ultrasonic processing, in conjunction with which the laminate that is defined by the top layer and the admission material when these are joined together includes a reinforcement executed with ultrasonic processing essentially along its peripheral edge. Also, a method for manufacturing the aforementioned products.
    Type: Application
    Filed: December 16, 2005
    Publication date: March 26, 2009
    Applicant: SCA Hygiene Products AB
    Inventors: Carin Hakansson, Johan Wahlstrom
  • Publication number: 20060229579
    Abstract: absorbent article comprising a liquid transfer layer (5) positioned between a liquid pervious bodyside liner (6) and an absorbent core (2). The liner (6) comprises a plurality of perforations (7). The liner and the transfer layer are bonded together in a plurality of bonding sites (11) covering an area of between 0.5% and 11% of the area of the liner (6) that is circumscribed by the bonding sites and wherein each bonding site has an area of no more than 13 mm2. The combined perforated liner (6) and transfer layer (5) provides a quick inlet of liquid and a low rewet against the wearer. The liner (6) has a three-dimensional structure of alternating raised and depressed regions and the perforations (7) are present in the bottoms of the depressions (8) of said liner as seen from the body facing side of the liner.
    Type: Application
    Filed: March 3, 2006
    Publication date: October 12, 2006
    Applicant: SCA HYGIENE PRODUCTS AB
    Inventors: Johan Wahlstrom, Bror-Inge Helmfridsson, Ken Olsson, Patrik Andersson, Anne Farbrot
  • Patent number: 6998512
    Abstract: Fibrous material layer intended to be incorporated in an absorbent article. The layer (5) comprises at least two webs of tow fibers arranged on top of each other, which are bonded to each other into a laminate by means of a bonding pattern, and where one is corrugated and the other web is substantially smooth, wherein the corrugated web exhibits a more open structure in comparison to the smooth web. A method of manufacturing the layer (5) in question, in which method at least two separate webs (15a, b) of opened and into a layer spread-out tow are fed into a bonding station (20), which webs exhibit different web tensions and/or web speeds, and that the webs (15a, b) with maintained relative difference in web tension and/or web speed are bonded together in said bonding pattern (10) into a laminate.
    Type: Grant
    Filed: September 27, 2002
    Date of Patent: February 14, 2006
    Assignee: SCA Hygiene Products AB
    Inventors: Johan Wahlström, Lena Björnström, Leif Alm, Fredrik Krook, Sven-Erik Johansson
  • Patent number: 6888045
    Abstract: A fibrous material and a method of producing it, the material is mainly intended to be incorporated in an absorbent article and comprises a layer of continuous fibers, so-called tow, which have been bonded together in points, lines or spots in a bonding pattern, but otherwise are substantially unbonded to each other. The tow layer is bonded with at least two bonding patterns: a first relatively strong and diffuse bonding pattern, and a second more distinct second bonding pattern. Bonding of at least the first bonding pattern takes place by thermobonding, wherein a pattern roll is used which provide the desired bonding patterns. In the first welding step the pattern roll is driven at a higher speed than the feeding speed of the tow layer, so as to create a relatively diffuse and strong bonding pattern.
    Type: Grant
    Filed: September 6, 2002
    Date of Patent: May 3, 2005
    Assignee: SCA Hygiene Products AB
    Inventors: Johan Wahlström, Jan Wästlund-Karlsson
  • Publication number: 20030093044
    Abstract: A fibrous material and a method of producing it, the material is mainly intended to be incorporated in an absorbent article and comprises a layer of continuous fibres, so-called tow, which have been bonded together in points, lines or spots in a bonding pattern, but otherwise are substantially unbonded to each other. The tow layer is bonded with at least two bonding patterns: a first relatively strong and diffuse bonding pattern, and a second more distinct second bonding pattern. Bonding of at least the first bonding pattern takes place by thermobonding, wherein a pattern roll is used which provide the desired bonding patterns. In the first welding step the pattern roll is driven at a higher speed than the feeding speed of the tow layer, so as to create a relatively diffuse and strong bonding pattern.
    Type: Application
    Filed: September 6, 2002
    Publication date: May 15, 2003
    Inventors: Johan Wahlstrom, Jan Wastlund-Karlsson
  • Publication number: 20030073967
    Abstract: Fibrous material layer intended to be incorporated in an absorbent article. The layer (5) comprises at least two webs of tow fibers arranged on top of each other, which are bonded to each other into a laminate by means of a bonding pattern, and where one is corrugated and the other web is substantially smooth, wherein the corrugated web exhibits a more open structure in comparison to the smooth web. A method of manufacturing the layer (5) in question, in which method at least two separate webs (15a, b) of opened and into a layer spread-out tow are fed into a bonding station (20), which webs exhibit different web tensions and/or web speeds, and that the webs (15a, b) with maintained relative difference in web tension and/or web speed are bonded together in said bonding pattern (10) into a laminate.
    Type: Application
    Filed: September 27, 2002
    Publication date: April 17, 2003
    Inventors: Johan Wahlstrom, Lena Bjornstrom, Leif Alm, Fredrik Krook, Sven-Erik Johansson
  • Patent number: D574207
    Type: Grant
    Filed: December 20, 2006
    Date of Patent: August 5, 2008
    Assignee: Husqvarna AB
    Inventors: Carl-Johan Arnesson, Peter Björkman, Fredrik Cederholm, Margareta Eriksson, Kenneth Karlsson, Stefan Kullberg, Johan Wahlström, Per Viktorsson