Abstract: A toothbrush comprising a handle and a head supported at one end of the handle. The head includes a portion extending from the handle and having bristles mounted thereon. The head also includes a series of bristle tuft carriers based from the handle extension portion. Each bristle tuft carrier retains at least one tuft of bristles. A region between the bristle tuft carriers and the handle extension portion includes an elastomeric material configured to provide resilient flexing of the bristle tuft carriers with respect to the handle extension during tooth brushing, so that the bristles and the bristle tuft carriers move relative to the bristles on the handle extension portion.

Abstract: A process for making a molded article of two components e.g., plastic material and elastomer, in which internal cores are used to form a hollow toothbrush body, and elastomer is injected to form surface features. The toothbrush body can be made bulky in shape but light by virtue of being hollow.

Abstract: A toothbrush comprising a handle with a head includes a base end facing the handle in a tip end remote from the base end. The head adjoins the handle at the base end of the head, and the head and the handle are disposed along the longitudinal toothbrush axis. The head also includes a substantially rigid base region joining the toothbrush handle and extending from the base end of the head to a link region situated between the base end and the tip end. The head further includes a tip region extending from the tip end of the head to the link region, such that the tip region is flexibly and resiliently linked at the link region to the base region and the base region extends for at least 60% of the distance between the base end of the head and the tip of the head.

Abstract: A toothbrush comprising a handle and a head supported at one end of the handle. The head includes a portion extending from the handle and having bristles mounted thereon. The head also includes a series of bristle tuft carriers based from the handle extension portion. Each bristle tuft carrier retains at least one tuft of bristles. A region between the bristle tuft carriers and the handle extension portion includes an elastomeric material configured to provide resilient flexing of the bristle tuft carriers with respect to the handle extension during tooth brushing, so that the bristles and the bristle tuft carriers move relative to the bristles on the handle extension portion.

Abstract: A toothbrush in which the head comprises a substantially rigid base region adjoining the toothbrush neck and extending from the base end of the head to a resilient flexible link situated between the base end and the tip end, and a tip region extending from the tip end of the head to the link region, both the base region and tip region being bristle bearing, the tip region being flexibly and resiliently linked at the link region to the base region, and between the base end of the head and the neck there is a resilient flexible link.

Abstract: A toothbrush comprising a handle with a head includes a base end facing the handle in a tip end remote from the base end. The head adjoins the handle at the base end of the head, and the head and the handle are disposed along the longitudinal toothbrush axis. The head also includes a substantially rigid base region joining the toothbrush handle and extending from the base end of the head to a link region situated between the base end and the tip end. The head further includes a tip region extending from the tip end of the head to the link region, such that the tip region is flexibly and resiliently linked at the link region to the base region and the base region extends for at least 60% of the distance between the base end of the head and the tip of the head.

Abstract: A mixing device for fluids, comprising a column within which there is an internal core, a space between the column and core defining a channel for the flow of the fluids, the surface of the column facing the core having fluid guide elements which impart helical flow in a first twist direction upon a fluid flowing along the channel, the surface of the core having fluid guide elements thereon which impart helical flow in an opposite twist direction upon the fluid. On part of the channel, the helical flow imparted to the fluid is predominantly in the twist direction of the elements on the core and on a part of the channel upstream or downstream of this part the helical flow imparted to the fluid is predominantly in the twist direction of the elements on the column.

Abstract: A toothbrush having a head (2) which is made flexible by virtue of being made in the form of a number of segments (2A-E), each linked by thin integral links (7) of defined thickness and length, and the link may also incorporate an elastomeric material (9) to modify flexibility. The invention provides improved flexibility characteristics of the head.

Abstract: A toothbrush in which the head comprises a base region adjoining the handle, and a tip region, the tip region being flexibly and resiliently linked at a link region to the base region in a manner which enables the tip region to fold or pivot resiliently relative to the base during toothbrushing.

Abstract: This invention relates to a process for making a toothbrush comprising making a toothbrush head having at its basal end a first engagement part, then making a toothbrush grip handle from a plastics material by a handle molding process, during the handle molding process forming a second engagement part at the head end of the handle in engagement with the first engagement part, such that the engagement between the first and second engagement parts retains the head and grip handle together, and toothbrushes made by this process.

Abstract: Two phase remineralizing compositions are described comprising a source of calcium ions and a source of phosphate ions together with a water soluble polyphosphate salt.

Abstract: A toothbrush wherein the stiffness of the bristles varies along the length or across the width of the head of the toothbrush.