Appeal No. 1999-2572
Application 08/419,678
Representative claim 1 is reproduced as follows:
1. An inkjet printing head in which piezoelectric
elements are flexed by a drive voltage applied thereto and
cause a diaphragm, where the piezoelectric elements are
disposed to, to shudder so as to eject ink through nozzles,
the inkjet printing head comprising:
(a) a plurality of nozzles arranged in a plurality of
rows on a head base plate, each of the nozzle rows being
arranged in an inclined manner along a sub-scanning direction
where a printing medium is moved, and each of the nozzle rows
being spaced apart from an adjacent nozzle row by a distance
which is at least twice a printing width; and
(b) a plurality of pressure chambers disposed on the
head base plate, the pressure chambers being in communication
with the nozzles, changing capacity in response to shudders of
the diaphragm, and being arranged in two rows along the sub-
scanning direction, in a vicinity of each nozzle row.
The examiner relies on the following references:
Chan et al. (Chan) 4,812,859 Mar. 14, 1989
Hirano et al. (Hirano) 5,235,353 Aug. 10, 1993
Rhoads et al. (Rhoads) 5,414,453 May 09, 1995
(filed Oct. 29,
1993)
Zandian et al. (Zandian) 5,485,183 Jan. 16, 1996
(filed June 30,
1993)
Kohei EP 0,584,823 Mar. 02, 1994
Claims 1-11 stand rejected under 35 U.S.C. § 103. As
evidence of obviousness the examiner offers Kohei in view of
Zandian and Chan with respect to claims 1-7, adds Rhoads with
-2-
Page: Previous 1 2 3 4 5 6 7 8 9 Next
Last modified: November 3, 2007