Claims
- 1. A method of securing an elastic band (13) between two material layers (14) which at least partially consists of meltable material, characterized in that perforations in the form of holes and/or slots are formed in the elastic band (13); in that the band is placed between the two material layers; and in that the material layers opposite said perforations are mutually bonded by heat fusion through said perforations.
- 2. A method according to claim 1, characterized in that the perforations are formed in the elastic band at the same time as the material layers are fused together.
- 3. A method according to any one of claims 1 and 2, characterized in that the elastic band (13) is placed between the two material layers (14) while in a stretched state.
- 4. A method according to any one of the preceding claims, characterized in that the elastic band is pretensioned by being stretched uniformly, is positioned between the material layers (301) and is caused to pass over a bonding roller (308) which has a pattern of raised portions thereon and which functions to bond the elastic band (304) to the material layers (301) surrounding said band, with the aid of ultrasound (309), wherein the ultrasound perforates the elastic device and fuses together the two material layers through the perforations in a bonding pattern corresponding to the pattern on the bonding roller.
- 5. An elastic band (13) secured between two material layers (14) for use in articles which are intended for one-time use only, such as disposable diapers, sanitary napkins, surgical dressings, protective clothing or the like, characterized in that the material layers (14) at least partially consists of meltable material; in that the elastic band (13) presents perforations in the form of holes and/or slots through which the material layers located on both sides of the band (13) are mutually joined together by melt fusion.
- 6. An elastic band (13) according to claim 5, characterized in that the band presents at least two regions (16, 18) of mutually different bonding patterns and of mutually different elasticity in the direction in which the band acts.
- 7. An elastic band according to claim 5 or 6, characterized in that it presents at least one region (17) of substantially punctiform perforations through which the two material layers are bonded together.
- 8. An elastic band according to claim 5, 6 or 7, characterized in that it presents at least one region (16, 18) with perforations which have a smaller extension in the direction in which the device acts than perpendicularly to said direction and through which the two material layers (14) are bonded together.
- 9. An elastic band according to any one of claims 5-8, characterized in that it consists of one or more separate bands of elastic foam material having open or closed cells.
- 10. An elastic band according to claim 9, characterized in that the foam material is a polyester-based polyurethane foam.
- 11. An elastic band according to any one of claims 5-8, characterized in that it consists of one or more separate bands of rubber material, such as polyurethane rubber or natural rubber.
- 12. A diaper comprising a liquid-permeable casing layer (1), which is intended to face the wearer in use, a liquid-impermeable casing layer (2), which is intended to lie remote from the wearer in use, and an absorbent pad (3) located between said two layers (1, 2), and which diaper has a front part (4) which is intended to be located forwardly on the wearer in use, a rear part (5) which is intended to be located rearwardly on the wearer in use, and a crotch part (6) which is located between the front part (4) and the rear part (5) and which is intended to be placed between the thighs of the wearer in use, so that the diaper, when worn, embraces the lower abdomen of the wearer in a trouser-like fashion and therewith presents a waist line (7, 8) around the waist of the wearer and a leg line around each of the user's thighs, characterized in that the diaper includes at least one elastic band (13) which is secured in a stretched state between two material layers (14) which are at least partially comprised of a meltable material; in that the band presents perforations in the form of holes and/or slots (15) through which the material layers (14) located on opposite sides of the band are mutually bonded by melt fusion, so that the elastic band (13) is held mechanically between the material layers (14); and in that the elastic band (13) is affixed along the whole of at least one of the diaper lines or at least along a part of at least one of the diaper lines and at least one of the material layers (14) is joined to one of the casing layers in at least one of the diaper line parts.
- 13. A diaper according to claim 12, characterized in that at least one of the material layers (207, 209, 210) surrounding the elastic band (201) comprises one of the diaper casing layers.
- 14. A diaper according to claim 13, characterized in that the liquid-permeable casing layer (205) is folded over the elastic band (201).
- 15. A diaper according to claim 13, characterized in that the liquid-impermeable casing layer (203) is folded over the elastic band (201).
- 16. A diaper according to claim 12, characterized in that the elastic band (201) is encased in a separate casing (210) of meltable material.
- 17. A diaper according to any one of claims 12-16, characterized in that an elastic band (13) is attached at least along the waist line on the rear part (5) of the diaper; in that the diaper has fastener tabs (9, 10) which function to secure the diaper in a trouser-like configuration, said fastener tabs (9, 10) being affixed to the sides of the rear part (5) of the diaper in the close proximity of the waist line (7, 8); and in that the elastic band (13) presents a pattern of perforations (15) which extend substantially transversely across the band within those regions (16, 18) of the waist line (7, 8) at which the fastener tabs (9, 10) are affixed.
- 18. A diaper according to any one of claims 12-17, characterized in that an elastic band (111, 112) is affixed to each leg line; and in that said bands each present at least two regions (116-120) of mutually different bonding patterns and therewith mutually different degrees of elasticity.
- 19. A diaper according to claim 18, characterized in that each of the elastic bands (111, 112) presents at least three regions (117-121) of mutually different bonding patterns and therewith mutually different degrees of elasticity, of which regions the region (119) located in the crotch part (106) of the diaper has the greatest elasticity.
- 20. A diaper according to any one of claims 8-17, characterized in that it includes further elastic devices (11, 12) such as elastic bands or threads which are affixed to the diaper by gluing or welding.
Priority Claims (1)
Number |
Date |
Country |
Kind |
8903256-9 |
Oct 1989 |
SE |
|
Parent Case Info
[0001] This application is a continuation of application Ser. No. 08/597,377 filed on Feb. 8, 1996, which is a continuation of application Ser. No. 08/240,207 filed on May 9, 1994 (now abandoned), which is a continuation of application Ser. No. 07/844,629 filed on Apr. 1, 1992 (now abandoned), which was a national stage filing under 35 U.S.C. § 371 of International Application No. PCT/SE90/00631 filed on Oct. 2, 1990, which international application was published by the International Bureau in English on Apr. 18, 1991.
Continuations (3)
|
Number |
Date |
Country |
Parent |
08597377 |
Feb 1996 |
US |
Child |
09984506 |
Oct 2001 |
US |
Parent |
08240207 |
May 1994 |
US |
Child |
08597377 |
Feb 1996 |
US |
Parent |
07844629 |
Apr 1992 |
US |
Child |
08240207 |
May 1994 |
US |