THOMAS EDWARD PEEKEMA
Pilots at Emerald St, Beaverton, OR
License number
Oregon A1468826
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
15285 SW Emerald St, Beaverton, OR 97007
Personal information
See more information about THOMAS EDWARD PEEKEMA at radaris.comName
Address
Phone
15285 SW Emerald St, Beaverton, OR 97007
15185 Jaylee St, Beaverton, OR 97007
15285 Emerald St, Beaverton, OR 97007
15285 SW Emerald St, Beaverton, OR 97007
Professional information
Method And Apparatus For Operating An Ink Jet Head Of An Ink Jet Printer
US Patent:
4598303, Jul 1, 1986
Filed:
Nov 28, 1984
Appl. No.:
6/675687
Inventors:
Thomas E. Peekema - Beaverton OR
James O. Beehler - Canby OR
James O. Beehler - Canby OR
Assignee:
Tektronix, Inc. - Beaverton OR
International Classification:
G01D 1518
US Classification:
346140R
Abstract:
A method and apparatus is disclosed for operating an ink jet print head 14 of the type having an air chamber 64 to which a stream of air is delivered and an ink chamber 32. A valve 48 interrupts the flow of air to the air chamber 64 from time to time, such as after each copy of a print is printed by the print head. This reduces the air pressure within the air chamber 64 and permits ink from ink chamber 32 to enter the air chamber 64 and replenish ink within the air chamber. The ink pressure is increased while the air pressure is reduced. This reduces the time required to replenish the ink. With the ink in the air chamber maintained at a consistent quantity and shape, the convergence of ink drops on printing medium is enhanced.