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NON-IMPACT PRINTER EMPLOYING A SEMICONDUCTOR DIODE LASER

IP.com Disclosure Number: IPCOM000025564D
Original Publication Date: 1986-Apr-30
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 126K

Publishing Venue

Xerox Disclosure Journal

Abstract

Shown in Figure 1 is non-impact printer 20 which, in prmcipal, IS the same type of printer as disclosed in U.S. patents 3,396,401 and 3,410,203 except for the employment of a single high power diode laser as a fusing source. In Figure 1, the paper medium I2 is provided from supply roll 14 to take up roll 16. Medium 12 immediately reeled from roll 14 and is uniformly supplied with toner 20 across its width from hopper 18 mounted immediately above medium 12, The uniformly toner covered medium 12 then proceeds to a scanning station mounted above medium 12 which comprises a scanner 22 and high power diode laser 24. Scanner 22 translates beam 27 of laser 24 in raster scan fashion across medium 12 as medium 12 is moved in the direction of arrow 26. As the laser beam 27 IS scanned, the beam IS modulated according to an input data signal representative of the information to be recorded.

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XEROX DISCLOSURE JOURNAL

NON-IMPACT PRINTER EMPLOYING A SEMICONDUCTOR DIODE LASER Donald R. Scifres
William Streifer

Proposed Classification US. C1. 346/1.1
Int. CI. Gold 9/00

SCANNER

HIGH POWER DIODE LASER

TONER HOPPER

'AKE-UP ROLL

14 SUPPlV ROLL /ti

Shown in Figure 1 is non-impact printer 20 which, in prmcipal, IS the same type of printer as disclosed in U.S. patents 3,396,401 and 3,410,203 except for the employment of a single high power diode laser as a fusing source. In Figure 1, the paper medium I2 is provided from supply roll 14 to take up roll 16. Medium 12 immediately reeled from roll 14 and is uniformly supplied with toner 20 across its width from hopper 18 mounted immediately above medium 12, The uniformly toner covered medium 12 then proceeds to a scanning station mounted above medium 12 which comprises a scanner 22 and high power diode laser 24. Scanner 22 translates beam 27 of laser 24 in raster scan fashion across medium 12 as medium 12 is moved in the direction of arrow 26. As the laser beam 27 IS scanned, the beam IS modulated according to an input data signal representative of the information to be recorded.

Laser beam 27 is focused onto medium 12 using the optic system disclosed, for example, in U.S. Patent Application Serial No. 637,708 filed August 6, 1984 and in the Article of Donald R, Scifres et a1 entitled "Focusme. of a 7700A High Power Phased Array Semiconductor Laser", Applied PhysiG Letters, Voluie 41(12) pp. 1121-1123, December 15, 1982. The power level of solid state laser 24 is sufficient &euroor focusing conventional toners bnto the surface of medium 12. Laser 24 is modulated according to the data signal to fuse the toner to medium

Volume 11 Number 2 MarchlRpril 1986 63

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NON-IMPACT PRINTER EMPLOYING A SEMICONDUCTOR DIODE LASER

(Cont'd)

12 in areas where the image is to be formed leaving the unimaged areas of toner in its original loose condition on the surface of medium 12.

Downstream from the scanning station is toner removal station 30 where the loose toner is removed from the surface of medium 12. At this point, a fused imaged 32 remains on the surface of medium 12 which is taken up upon roll 16.

Experiments have been conducted using a multi-emitter phased array laser of the type disclosed in the Article of Donald R. Scifres et a1 entitled, "Phase-Lock...