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Adjustable Ink Jet Head Assembly

IP.com Disclosure Number: IPCOM000078630D
Original Publication Date: 1973-Feb-01
Included in the Prior Art Database: 2005-Feb-26
Document File: 3 page(s) / 77K

Publishing Venue

IBM

Related People

Denny, CM: AUTHOR

Abstract

Adjustment of a head assembly establishes correct trajectory of a stream of ink emanating from a nozzle, and aims it so that the stream passes properly through a charge electrode and into a gutter, all contained in a deflection plate assembly. An adjustable head assembly is needed, because the nozzle through which the ink squirts has its own characteristics, directing the ink in some direction other than along the axis of the nozzle assembly. The nozzle assembly is thus aimed to compensate for the directive characteristic of the particular nozzle used. Fig. 1 is a top elevation of the assembly; Fig. 2 a side elevation.

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Adjustable Ink Jet Head Assembly

Adjustment of a head assembly establishes correct trajectory of a stream of ink emanating from a nozzle, and aims it so that the stream passes properly through a charge electrode and into a gutter, all contained in a deflection plate assembly. An adjustable head assembly is needed, because the nozzle through which the ink squirts has its own characteristics, directing the ink in some direction other than along the axis of the nozzle assembly. The nozzle assembly is thus aimed to compensate for the directive characteristic of the particular nozzle used. Fig. 1 is a top elevation of the assembly; Fig. 2 a side elevation.

Nozzle assembly 1 mounts on a mounting plate 3 into which four pins 2 are inserted, two on each side. There are two pairs of projections on quadrant plate 6, the left pair 6c and the right paid 6d. Side frames 20 and 21 are affixed to the projection pairs 6c and 6d, respectively. For clarity, only member 21 is shown in its entirety in Fig. 2. Members 20 and 21 have slots such as 21a and 21b in member 21 for guiding plate 3 on pins 2 in an arc 22 about an axis 27, which passes directly above pin 5 projecting from a platform 7, axis 27 being parallel to plate 3. Side frames 20 and 21 are affixed to a quadrant plate 6 as mentioned above, the quadrant plate 6 pivoting on pin 5, thereby rotatably connecting quadrant plate 6 to platform 7.

Two screws, 23 and 24, thread in projections 7a and 7b on platform 7 and are turned until they contact opposite sides of the slotted tongue 6a, at the right end of quadrant plate 6. These screws can be turned to give very fine quadrant adjustments to the ink stream 29, which pivots directly over pin 5 on axis 26. A locking screw 25, through slot 6b in tongue 6a in quadrant plate 6 serves to secure it in its adjusted position to platform 7.

Screw 10 threaded into quadrant plate 6 supports tongue 11a of an elevation bracket 11, which is mounted directly to the mounting plate 3. A spring 12, attached to tongue...