Adhesive-based ink jet print head assembly
View Patent ↗An ink jet print head assembly ( 10 ) includes at least one elongate ink jet print head chip ( 20 ) that is the product of an integrated circuit fabrication technique. The assembly ( 10 ) also includes at least one corresponding ink jet print head chip carrier ( 14 ) that defines an elongate recess ( 18 ) having a pair of opposed side walls ( 28 ). The, or each, print head chip ( 20 ) is received in one respective recess ( 18 ). The, or each, ink jet print head chip ( 20 ) and said respective recess ( 18 ) are dimensioned so that a gap ( 26 ) is defined between the, or each, ink jet print head chip ( 20 ) and each side wall ( 28 ). Resiliently deformable material ( 22 ) is positioned in each gap to retain the, or each, print head chip ( 20 ) in position in said respective recess ( 18 ).
1. An ink jet print head assembly for a page width ink jet print head, the print head assembly comprising
at least one elongate ink jet print head chip that is the product of an integrated circuit fabrication technique;
at least one corresponding ink jet print head chip carrier that defines an elongate recess having a pair of opposed side walls, the, or each, print head chip being received in one respective recess, the, or each, ink jet print head chip and said respective recess being dimensioned so that a gap is defined between the, or each, ink jet print head chip and each side wall; and
a resiliently deformable material positioned in each gap to fill each gap and to retain the, or each, print head chip in position in said respective recess, the resiliently deformable material being selected to accommodate relative a movement of the at least one print head chip and the at least one print head chip carrier during normal handling of the print head assembly.
2. An ink jet print head assembly as claimed in claim 1 , which includes a number of the ink jet print head chips positioned in the elongate recesses of the ink jet print head chip carriers that correspond to the ink jet print head chips.
3. An ink jet print head assembly as claimed in claim 1 , in which the ink jet print head chip carrier is mounted to an ink distribution manifold.
4. An ink jet print head assembly as claimed in claim 1 , which includes a number of modules, each module including one ink jet print head chip carrier and one ink jet print head chip mounted in the carrier and a retaining structure in which the modules are mounted.
5. An ink jet print head assembly as claimed in claim 1 , in which the resiliently deformable material is an elastomeric material.
6. An ink jet print head assembly as claimed in claim 5 , in which the elastomeric material is in the form of a silicon based material.
7. A method of assembling an ink jet print head having at least one elongate ink jet print head chip that is the product of an integrated circuit fabrication technique and at least one corresponding ink jet print head chip carrier that defines an elongate recess having a pair of opposed side walls, the, or each, ink jet print head chip and said respective recess being dimensioned so that a width of said the, or each, print head chip is less than a width of said respective recess to a predetermined extent, the method comprising the steps of:
positioning the, or each, ink jet print head chip in said respective carrier so that a gap is defined on each side of the ink jet print head chip by said pair of opposed side walls and the ink jet print head chip; and
filling each gap with an adhesive that is selected from a group of adhesives that cure into an elastically deformable material to fix the, or each, ink jet print head chip in said respective recess, the adhesive being selected so that the elastically deformable material is capable of accommodating relative a movement of the, or each, print head chip and the, or each print head chip carrier during normal handling.