IP Library › Granted Patent US 7,433,154
Granted Patent B2
US 7,433,154 · App. 11/217,367 · Granted Oct 7, 2008

Cleaning tape for cleaning a magnetic head

View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 7,433,154
App. No.
11/217,367
Granted
Oct 7, 2008
Kind
B2
Abstract

A cleaning tape comprising a support and a coating layer containing powder and a binder, wherein a surface of the coating layer has a central line average roughness of from 5 to 25 nm and has protrusions having height of 25 nm or more in number of from 60 to 1,700/10 5 μm 2 , the surface of the coating layer being a surface of the cleaning tape.

Claims (8)

1. A cleaning tape comprising a support and a coating layer containing powder and a binder, wherein a surface of the coating layer has a central line average roughness of from 10 to 20 nm and has protrusions having height of 25 nm or more in number of from 60 to 1,700/10 5 μm 2 , the surface of the coating layer being a surface of the cleaning tape.

2. The cleaning tape according to claim 1 , wherein the coating layer comprises a nonmagnetic layer and a magnetic layer so that the support, the nonmagnetic layer and the magnetic layer are provided in this order.

3. The cleaning tape according to claim 2 , further comprising a backing layer so that the backing layer, the support, the nonmagnetic layer and the magnetic layer are provided in this order, wherein the nonmagnetic layer contains nonmagnetic inorganic powder and a binder, the magnetic layer contains ferromagnetic powder and a binder and the backing contains a carbon black and inorganic powder.

4. The cleaning tape according to claim 1 , wherein the surface of the coating layer has a central line average roughness of from 12 to 18 nm.

5. The cleaning tape according to claim 1 , wherein the surface of the coating layer has protrusions having height of 25 nm or more in number of from 100 to 1,600/10 5 μm 2 .

6. The cleaning tape according to claim 1 , wherein the surface of the coating layer has protrusions having height of 25 nm or more in number of from 500 to 1,500/10 5 μm 2 .

7. The cleaning tape according to claim 1 , wherein the support is a nonmagnetic flexible support.

8. The cleaning tape according to claim 1 , wherein the support comprises polyethylene terephthalate or polyimide.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 15, 2007
From: FUJIFILM HOLDINGS CORPORATION (FORMERLY FUJI PHOTO FILM CO., LTD.)
To: FUJIFILM CORPORATION
Reel/Frame 018904/0001 →