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SYSTEM FOR SEALING THE SHIM STOCK TO THE INK MANIFOLD

IP.com Disclosure Number: IPCOM000027215D
Original Publication Date: 1995-Oct-31
Included in the Prior Art Database: 2004-Apr-07
Document File: 6 page(s) / 237K

Publishing Venue

Xerox Disclosure Journal

Abstract

Figure 1 illustrates an ink jet print cartridge 10 for printing in which a printhead die 12 and a supply of ink are combined in a single package. The main portion of the cartridge 10 is a manifold 14 which holds an ink supply contained in ink medium 16. The ink contained in the ink medium 16 is supplied to the printhead die 12 through a scavenger 18 which absorbs ink held in the medium 16 for supply to the printhead die 12 through an ink flow path 20. Ink, which flows through the ink flow path 20, is directed to a plurality of nozzles 22 through a relatively thin shim stock 24 having a predetermined shape and a slot 26 therethrough. The shim stock 24 is bonded to the manifold 14 and the printhead die 12. The slot 26 is substantially the same size as the printhead inlet and directs the flow of ink from the ink flow path 20 to the printhead nozzles 22.

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XEROX DISCLOSURE JOURNAL

SYSTEM FOR SEALING THE SHIM STOCK TO THE INK MANIFOLD Stephen F. Pond
Ram S. Narang
Peter J. Nystrom
Donald J. Drake
Frederick A. Warner
Robert P. Altavela

Proposed Classification
U.S. C1.346/140R Int. C1. GOlD 15/18

14

FIG. I

XEROX DISCLOSURE JOURNAL Vol. 20 No. 5 September/Odober 1995 427

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SYSTEM FOR SEALING THE SHIM STOCK TO THE INK MANIFOLD (Cont'd)

34 38

32 32 3q

428 XEROX DISCLOSURE JOURNAL Vol. 20 No. 5 September/October 1995

FIG. 2

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SYSTEM FOR SEALING THE SHIM STOCK TO THE INK MANIFOLD (Cont'd)

Figure 1 illustrates an ink jet print cartridge 10 for printing in which a printhead die 12 and a supply of ink are combined in a single package. The main portion of the cartridge 10 is a manifold 14 which holds an ink supply contained in ink medium 16. The ink contained in the ink medium 16 is supplied to the printhead die 12 through a scavenger 18 which absorbs ink held in the medium 16 for supply to the printhead die 12 through an ink flow path 20. Ink, which flows through the ink flow path 20, is directed to a plurality of nozzles 22 through a relatively thin shim stock 24 having a predetermined shape and a slot 26 therethrough. The shim stock 24 is bonded to the manifold 14 and the printhead die 12. The slot 26 is substantially the same size as the printhead inlet and directs the flow of ink from the ink flow path 20 to the printhead nozzles 22.

One method of attaching the shim stock 24 to the manifold 14 and to the printhead 24 is to use pressure sensitive adhesives. While pressure sensitive adhesives provide a convenient method of adhering the shim stock 24 to the manifold 14 and to the printhead die 12, pressure sensitive adhesives are incapable of forming very strong bonds since the adhesive action is purely of the vander Waals type.

Adhesives with monomeric precursors, which form more intimate bonds with both substrates, and on curing, which form polymeric networks are more likely to be able to withstand the corrosive action of ink than pressure sensitive adhesives. Epoxy or silylated epoxies meet these requirements. The other reason for selecting epoxy adhesives is the extensive choice of curing agents available for polymerisation of these adhesives which permits the selection of curing conditions necessary for a particular application.

An alternative to the dry seal method for capping the interface or shim stock between the ink manifold and the die in TIJ devices has been developed. In this approach, the shim stock used for capping in the dry seal method, is coated with a room temperature curing epoxy immediately prior to use.

Used in combination with polymeric dialkoxyalkylaminosilanes, such as PS076.5, dimethoxymethylsilylpropylsubstituted polyethylenimine, as the adhesion promoter, the adhesive bonds very strongly to both the shim stock and the manifold material...