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US 6,440,557 B1Granted
Brush filaments
AssigneeE. I. Du Pont de Nemours and Company
InventorMoosa Naghibi
Life of this patent
Estimating the term…
Abstract
Brush filaments having an outer surface which, distal from the filaments' free ends, exhibits sudden directional changes which in use can effect a cleaning action additional to that due to the free ends of the filaments is disclosed.
Claims18
A filament characterized in that
- (a) the filament having protrusions in sequential contact along the length of the filament, and
- (b) the filament cross-section is not uniform along the length of the filament, wherein the filament cross section, having protrusions, comprises a sequence of shapes of varying diameter along the length of the filament, said shapes defining an outer circumference of the protrusions.
A filament characterized in that
- (a) the filament having protrusions in sequential contact along the length of the filament;
- and
- (b) the filament cross section is not uniform along the length of the filament, wherein the filament cross section, having protrusions, comprises a sequence of shapes of uniform diameter along the length of the filament, said shapes defining an outer circumference of the protrusions.
A filament characterized in that
- (a) the filament having protrusions in sequential contact, each of said protrusions of the filament comprising 20-75% of the filament circumference along the filament length;
- and
- (b) the filament cross section is not uniform along the length of the filament wherein the cross section of the filament, having protrusions, comprises a sequence of
- (i) shapes of varying diameter, and
- (ii) at the location of the protrusions, the cross sections each of which has the shape of 20-75 percent of the circumference of a circle, said shapes defining an outer circumference of the protrusions.
2 more elements
A filament characterized in that
- (a) the filament having protrusions in sequential contact along the length of the filament, each of said protrusions comprising 20-75% of the filament circumference;
- and,
- (b) the filament cross section is not uniform along the length of the filament wherein along the filament length the cross section of the filament, having protrusions, comprises a sequence of
- (i) shapes of uniform diameter, and
- (ii) at the location of the protrusions, shapes that comprise 20-75% of the circumference of the filament occupied by the protrusion said shapes defining an outer circumference of the protrusions.
2 more elements
Dependencies are inferred from the claim text.