Claims
- 1. A print cartridge comprising:
- a plastic print cartridge body which has been injection molded, said print cartridge body including a first side having a depressed valley along a middle portion of said first side running along a length of said first side due to said middle portion sinking during an injection molding process to form said print cartridge body; and
- a flexible circuit secured on at least said first side of said print cartridge body,
- said flexible circuit having contact pads formed thereon for contacting corresponding electrodes in an ink printer, said flexible circuit having conductive traces terminating in said contact pads for connection to a printhead,
- said flexible circuit having a width larger than a width of said valley in said first side of said print cartridge body so as to extend to both sides of said valley and so that a middle portion of said flexible circuit running a length of said flexible circuit secured to said first side overlies said valley, none of said contact pads on said flexible circuit being formed in said middle portion of said flexible circuit where said flexible circuit overlies said valley.
- 2. The print cartridge of claim 1 wherein said contact pads are substantially square shaped.
- 3. The print cartridge of claim 1 wherein said contact pads are arranged along sides of said flexible circuit and not over said valley so that when said print cartridge is inserted into said ink printer, all of said contact pads will be in a substantially single plane so as to provide more reliable contact with corresponding electrodes in said ink printer.
- 4. The print cartridge of claim 3 wherein said contact pads are substantially square shaped and are separated from an adjacent contact pad by a minimum distance to allow for a maximum contact pad area.
- 5. The print cartridge of claim 3 wherein said contact pads are formed in parallel columns on both sides of said valley.
- 6. The print cartridge of claim 1 further comprising:
- a plurality of ink ejection elements contained within said printhead; and
- a demultiplexer having outputs coupled to said ink ejection elements, said conductive traces providing control signals to said demultiplexer, wherein said demultiplexer controls said ink ejection elements in response to said control signals received from said conductive traces via said contact pads.
CROSS REFERENCE TO RELATED APPLICATIONS
This is a continuation of copending application Ser. No. 08/055,617 filed on Apr. 30, 1993, now abandoned. This application relates to the subject matter disclosed in the co-pending U.S. Application entitled "Improved Ink Delivery System for an Inkjet Printhead," by Brian J. Keefe, et al. Ser. No. 07/862,086, filed Apr. 2, 1992 now U.S. Pat. No. 5,278,584. The above co-pending application is assigned to the present assignee and is incorporated herein by reference.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
4999650 |
Braun |
Mar 1991 |
|
5189787 |
Reed et al. |
Mar 1993 |
|
Non-Patent Literature Citations (1)
Entry |
Photocopy of the contact pad arrangement on the Canon BJ10 print cartridge. |
Continuations (1)
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Number |
Date |
Country |
Parent |
55617 |
Apr 1993 |
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