Microstructured high friction surface for high friction to fabric, yarn, and fibers
AssigneeHoowaki, LLC
InventorsRalph Hulseman, Sarah Hulseman
Life of this patent
Estimating the term…
Abstract
This invention is directed to an improved contact surface for manipulating articles wherein the microstructure included on the contact surface having a plurality of pillars spaced apart in the range of 200 μm and 600 μm, having a height in the range of 50 μm and 1200 μm, a width of in the range of 70 μm and 300 μm, a wall draft angle between 0° and 15°, a density of in the range of 5,000 to 20,000 pillars per square inch, and a friction rating greater than 7. The contact surface can be included on a sewing machine feed dog, a glove, sporting equipment, firearm grip, hand rail, tool grip, tool handle, and a strap such as for a satchel or backpack.
Claims17
A contact surface on a first article for manipulating a second article comprising:
- a microstructure arrangement included on the contact surface having a plurality of pillars spaced apart between 200 μm and 600 μm, having a height and width in a range of 90 μm and 110 μm and forming a generally square cross section so that said pillars are rigid to resist flexing and bending when contacting an article surface, a wall draft angle between 0° and 15°, a density of between 5,000 to 20,000 pillars per square inch, and a friction rating greater than 7 in relation to the contact surface and an article surface;
- and,
- a static co-efficient of friction in the range of 0.78 to 3.56 and a dynamic coefficient of friction in the range of 0.74 to 4.08 as determined by friction test ASTM 1894.
A contact surface on a first article for manipulating a second article comprising:
- a substrate disposed on the contact surface of the first article;
- a plurality of raised support structures disposed on said substrate, wherein each of said raised support structures has a generally pyramid shape;
- a microstructure arrangement included on said substrate having a plurality of pillars having a height in the range of 50 μm and 1200 μm, and a width in the range of 70 μm and 300 μm, wherein said pillars are disposed on top of said support structure;
- a wall draft angle in the range of 0° and 15°, a static co-efficient of friction in the range of 0.83 to 1.70 and a dynamic coefficient of friction in the range of 0.80 to 1.39 as determined by friction test ASTM 1894 in relation to cotton fabric.
Dependencies are inferred from the claim text.