Patents by Inventor Margareta Wennerbäck
Margareta Wennerbäck 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: 10561538Abstract: A method for production of disposable hygienic absorbent articles, the method comprising advancing in a first direction a continuous length of a substantially homogeneous elastic laminate web having a maximum elastic extensibility in the first direction of at least 40% under a peak load Fp; maintaining said substantially homogeneous elastic laminate web under a tensioning load Ft in the first direction during the advancing, the tensioning load Ft satisfying the condition: 0.03 Fp?Ft?0.25 Fp; attaching individual absorbent cores to the substantially homogeneous elastic laminate web while maintaining said substantially homogeneous elastic laminate web under the tensioning load Ft; and severing the substantially homogenous elastic laminate web into individual disposable hygienic absorbent articles.Type: GrantFiled: February 19, 2018Date of Patent: February 18, 2020Assignee: ESSITY HYGIENE AND HEALTH AKTIEBOLAGInventors: Kent Hermansson, Jan Wästlund-Karlsson, Margareta Wennerbäck, Carina Hedlund, Niclas Norrby
-
Patent number: 10201458Abstract: A method for producing pant-type articles having a waist-encircling portion and leg-encircling portions. The method includes forming a chassis structure and at least one elastic panel being formed by providing a first web, which is an elastic web including at least one layer of an elastic material. The first web is stretched at least 70% in at least one direction. The stretched first web is bonded while the first web is held in the stretched state to a second web. The second web includes at least one layer of an elastic or non-elastic material, and the bonded first and second webs form an elastic composite web. The elastic composite is relaxed in the at least one direction by at least 4% of the stretched length of the stretched first web. The chassis structure is assembled from chassis components including the stretched and relaxed composite web.Type: GrantFiled: November 3, 2008Date of Patent: February 12, 2019Assignee: ESSITY HYGEINE AND HEALTH AKTIEBOLAGInventors: Ulrika Carlson, Hans Een, Margareta Wennerbäck
-
Publication number: 20180168883Abstract: A method for production of disposable hygienic absorbent articles, the method comprising advancing in a first direction a continuous length of a substantially homogeneous elastic laminate web having a maximum elastic extensibility in the first direction of at least 40% under a peak load Fp; maintaining said substantially homogeneous elastic laminate web under a tensioning load Ft in the first direction during the advancing, the tensioning load Ft satisfying the condition: 0.03 Fp?Ft?0.25 Fp; attaching individual absorbent cores to the substantially homogeneous elastic laminate web while maintaining said substantially homogeneous elastic laminate web under the tensioning load Ft; and severing the substantially homogenous elastic laminate web into individual disposable hygienic absorbent articles.Type: ApplicationFiled: February 19, 2018Publication date: June 21, 2018Applicant: SCA Hygiene Products ABInventors: Kent HERMANSSON, Jan WÄSTLUND-KARLSSON, Margareta WENNERBÄCK, Carina HEDLUND, Niclas NORRBY
-
Patent number: 9114041Abstract: A method for production of disposable hygienic absorbent articles (12) in which each article has a substantially homogenous elastic laminate web (14) having a maximum elastic extensibility in a first direction of at least 40%, preferably at least 60%, and most preferably at least 80%, under a peak load Fp, and an absorbent core (16) attached to the elastic laminate web. The method including the steps of providing a continuous length of the elastic laminate web (14); advancing the continuous length of the elastic laminate web in a direction of travel (A) corresponding to the first direction; attaching individual absorbent cores (16) to the continuous length of the elastic laminate web at spaced intervals, and forming individual articles (12) from the thus assembled individual absorbent cores and the continuous length of said elastic laminate web.Type: GrantFiled: September 29, 2004Date of Patent: August 25, 2015Assignee: SCA HYGIENE PRODUCTS ABInventors: Kent Hermansson, Jan Wästlund-Karlsson, Margareta Wennerbäck, Carina Hedlund, Niclas Norrby
-
Patent number: 9102132Abstract: A pant type absorbent article having a core region includes an absorbent core and a chassis region surrounding the core region. The article in at least a part of the chassis region includes a coversheet in the form of an elastic laminate constituting the sole component of the chassis in at least 20% of the total surface area of the article. The elastic laminate has a tensile strength of at least 15 N/25 mm both in the longitudinal and transverse directions of the article and a tensile strength in the transverse direction of the article which is no more than 2.5 times and preferably no more than 2 times higher than the tensile strength in the longitudinal direction of the article. The force required to extend the elastic laminate 10% in the longitudinal direction of the article is no more than 5 N/25 mm.Type: GrantFiled: November 13, 2006Date of Patent: August 11, 2015Assignee: SCA HYGIENE PRODUCTS ABInventor: Margareta Wennerbäck
-
Patent number: 8852372Abstract: A method for producing pant-type absorbent articles, each article including a chassis structure having at least one elastic panel and an integrated absorbent core component, the method including a continuous pant-forming process including forming the chassis structure and incorporating the absorbent core component into the chassis structure. The at least one elastic panel is formed by a) separately producing a two-layer laminate having a first non-elastic fibrous nonwoven web and an elastic film, b) activating the two-layer laminate by incremental stretching in at least one activation direction to render the two-layer laminate elastically stretchable, c) stretching the activated two-layer laminate by 10-200% in the activation direction, d) introducing the two-layer laminate) in the pant-forming process, and e) laminating the elastic film of the stretched two-layer laminate to an elastic or nonwoven chassis component. An absorbent pant-type article produced in accordance with the method.Type: GrantFiled: May 12, 2006Date of Patent: October 7, 2014Assignee: SCA Hygiene Products ABInventors: Elisabeth Lakso, Margareta Wennerbäck, Jan Wästlund-Karlsson
-
Patent number: 8741083Abstract: A method for producing an elastically stretchable laminate having at least three layers, the method including the steps of: a) producing a first laminate having a first non-elastic fibrous nonwoven web and an elastic film; b) activating the first laminate by incremental stretching in at least one activation direction to render the first laminate elastically stretchable; c) stretching the activated first laminate to 10-200% in the activation direction; and d) laminating the stretched first laminate to a second non-elastic nonwoven web. An elastically stretchable laminate produced in accordance with the method is also disclosed.Type: GrantFiled: May 12, 2006Date of Patent: June 3, 2014Assignee: SCA Hygiene Products ABInventors: Margareta Wennerbäck, Jan Wästlund-Karlsson, Elisabeth Lakso
-
Patent number: 8444617Abstract: A pant-type absorbent article having an absorbent assembly having an absorbent core and a chassis, wherein the front and back portions are joined to each other along two opposite longitudinal side edges to define a waist-opening and a pair of leg-openings, at least one of the front and back portions has an elastic web material, a crotch portion located between the front portion and the back portion in the longitudinal direction of the article, the front portion having a length in the longitudinal direction, the back portion having a length in the longitudinal direction, and the crotch portion having a length in the longitudinal direction, the absorbent assembly overlapping a distance with both the front and back portions, the article having a longitudinal and a transverse direction, wherein the absorbent assembly overlaps no more than 20% of the surface area of each of the front and back portions.Type: GrantFiled: January 28, 2010Date of Patent: May 21, 2013Assignee: SCA Hygiene Products ABInventor: Margareta Wennerbäck
-
Patent number: 8303565Abstract: An absorbent article includes an absorbent section having first and second end portions and a central portion. A waist belt is attached to the absorbent section at its first end and has first and second belt portions extending on each side of the first end of the absorbent section for securing to each other around a wearer of the absorbent article. The second end of the absorbent section includes a fastening device for securing the second end of the absorbent section to the waist belt. The waist belt has a visual appearance different from the absorbent section, so as to simulate a belt. This provides the user with intuitive information on how the absorbent article should be applied.Type: GrantFiled: April 27, 2009Date of Patent: November 6, 2012Assignee: SCA Hygiene Products ABInventors: Maria Gustin Bergström, Margareta Wennerbäck
-
Patent number: 8109916Abstract: A pant-type absorbent article (55) includes a chassis structure, the chassis structure including a front panel (56), a back panel and a crotch panel (58) arranged between the front and back panels (56,57) and front and back waist panels (61a,61b) arranged at the front and back panels (56,57) respectively. At least one of the front and back panels (56,57) includes an activated three-layer elastic laminate (68) including a first fibrous nonwoven web and a second fibrous nonwoven web and an elastic film between the first and second fibrous nonwoven webs. At least one of the first and second fibrous nonwoven webs is a creped nonwoven web.Type: GrantFiled: November 13, 2006Date of Patent: February 7, 2012Assignee: SCA Hygiene Products ABInventor: Margareta Wennerbäck
-
Patent number: 8092440Abstract: An absorbent article of the kind which is worn as a pair of absorbent pants with a waist opening defined by a rear waist edge and a front waist edge, and two leg openings. The absorbent article preferably includes an absorbent body attached to a covering. The covering preferably includes an elastic material arranged within an area which extends at least from the front waist edge to the leg openings. The elastic material is preferably treated. The treated elastic material preferably has no or reduced elasticity within a portion of the covering overlapping the absorbent core.Type: GrantFiled: June 28, 2004Date of Patent: January 10, 2012Assignee: SCA Hygiene Products ABInventors: Kent Hermansson, Carina Hedlund, Niclas Norrby, Jan Wästlund-Karlsson, Margareta Wennerbäck
-
Publication number: 20110209270Abstract: A method for producing pant-type articles having a waist-encircling portion and leg-encircling portions. The method includes forming a chassis structure and at least one elastic panel being formed by providing a first web, which is an elastic web including at least one layer of an elastic material. The first web is stretched at least 70% in at least one direction. The stretched first web is bonded while the first web is held in the stretched state to a second web. The second web includes at least one layer of an elastic or non-elastic material, and the bonded first and second webs form an elastic composite web. The elastic composite is relaxed in the at least one direction by at least 4% of the stretched length of the stretched first web. The chassis structure is assembled from chassis components including the stretched and relaxed composite web.Type: ApplicationFiled: November 3, 2008Publication date: September 1, 2011Applicant: SCA HYGIENE PRODUCTS ABInventors: Ulrika Carlson, Hans Een, Margareta Wennerbäck
-
Publication number: 20100324513Abstract: A pant-type absorbent article (55) includes a chassis structure, the chassis structure including a front panel (56), a back panel and a crotch panel (58) arranged between the front and back panels (56,57) and front and back waist panels (61a,61b) arranged at the front and back panels (56,57) respectively. At least one of the front and back panels (56,57) includes an activated three-layer elastic laminate (68) including a first fibrous nonwoven web and a second fibrous nonwoven web and an elastic film between the first and second fibrous nonwoven webs. At least one of the first and second fibrous nonwoven webs is a creped nonwoven web.Type: ApplicationFiled: November 13, 2006Publication date: December 23, 2010Applicant: SCA Hygiene Products ABInventor: Margareta Wennerbäck
-
Publication number: 20100298798Abstract: The invention concerns a method for producing pant-type absorbent articles each article (21) including a chassis structure having at least one elastic panel and an integrated absorbent core component (32), the method including a continuous pant-forming process comprising forming the chassis structure and incorporating the absorbent core component (32) into the chassis structure. The at least one elastic panel is formed by a) separately producing a two-layer laminate (8) comprising a first non-elastic fibrous nonwoven web (1) and an elastic film (6), b) activating the two-layer laminate (8) by incremental stretching in at least one direction to render the two-layer laminate (8) elastically stretchable, c) stretching the activated two-layer laminate (8) by 10-200% in at least one direction, d) introducing the two-layer laminate (24,25) in the pant-forming process, and e) laminating the elastic film (6) of the stretched two-layer laminate (24,25) to an elastic or nonwoven chassis component (39, 40, 23, 54).Type: ApplicationFiled: May 12, 2006Publication date: November 25, 2010Applicant: SCA Hygiene Products ABInventors: Elisabeth Lakso, Margareta Wennerbäck, Jan Wästlund-Karlsson
-
Publication number: 20100130956Abstract: A pant-type absorbent article having an absorbent assembly having an absorbent core and a chassis, wherein the front and back portions are joined to each other along two opposite longitudinal side edges to define a waist-opening and a pair of leg-openings, at least one of the front and back portions has an elastic web material, a crotch portion located between the front portion and the back portion in the longitudinal direction of the article, the front portion having a length in the longitudinal direction, the back portion having a length in the longitudinal direction, and the crotch portion having a length in the longitudinal direction, the absorbent assembly overlapping a distance with both the front and back portions, the article having a longitudinal and a transverse direction, wherein the absorbent assembly overlaps no more than 20% of the surface area of each of the front and back portions.Type: ApplicationFiled: January 28, 2010Publication date: May 27, 2010Applicant: SCA Hygiene Products ABInventor: Margareta WENNERBÄCK
-
Publication number: 20090306616Abstract: A pant type absorbent article having a core region includes an absorbent core and a chassis region surrounding the core region. The article in at least a part of the chassis region includes a coversheet in the form of an elastic laminate constituting the sole component of the chassis in at least 20% of the total surface area of the article. The elastic laminate has a tensile strength of at least 15 N/25 mm both in the longitudinal and transverse directions of the article and a tensile strength in the transverse direction of the article which is no more than 2.5 times and preferably no more than 2 times higher than the tensile strength in the longitudinal direction of the article. The force required to extend the elastic laminate 10% in the longitudinal direction of the article is no more than 5 N/25 mm.Type: ApplicationFiled: November 13, 2006Publication date: December 10, 2009Applicant: SCA Hygiene Products ABInventor: Margareta Wennerbäck
-
Publication number: 20090208703Abstract: A method for producing an elastically stretchable laminate having at least three layers, the method including the steps of: a) producing a first laminate having a first non-elastic fibrous nonwoven web and an elastic film; b) activating the first laminate by incremental stretching in at least one activation direction to render the first laminate elastically stretchable; c) stretching the activated first laminate to 10-200% in the activation direction; and d) laminating the stretched first laminate to a second non-elastic nonwoven web. An elastically stretchable laminate produced in accordance with the method is also disclosed.Type: ApplicationFiled: May 12, 2006Publication date: August 20, 2009Applicant: SCA Hygiene Products ABInventors: Margareta Wennerbäck, Jan Wästlund-Karlsson, Elisabeth Lakso