Tharo Gemini

  Tharo Thermal Barcode Printers 

Gemini label printer
590 5343 GEMINI/ GEMINI 2/ APOLLO 3 - 203dpi Printhead
5905343 KPT-104-8MPF1 (New)

Retired, no longer available: Contact for alternatives

Bar Code Label Printing with Standard Windows Software
A Printer Built for Windows

Bar code label printing is now easier for Microsoft Windows users with Tharo Systems innovative GEMINI printer. The GEMINI is the first of its kind - a printer actually designed and built to work only with Windows, while setting new standards in seamless integration. The GEMINI is so completely integrated with the Windows environment that most printer control, beyond power on/off, is done through the on-screen GEMINI Control Panel application. And, our unique driver, with built-in bar codes, makes printing to the GEMINI possible from almost any Windows application, such as MS Word, Write, Wordpad, Access and Visual Basic, as well as Lotus Approach, Paradox, and dBASE. Now you can create bar code labels from the applications you already have, without special programming or purchasing additional software. 

Quality Printing with Windows Fonts and Graphics

Most label printers provide a limited selection of built-in, standard fonts. With the GEMINI, your choices include all of the True Type fonts available with your Windows applications. The fonts you select, as well as your Windows graphics, are downloaded to the printer as needed . . . all at a download speed that is unequaled by other printers or drivers! GEMINI accomplishes this with our superior driver design and the high-speed bi-directional communications of the Centronics parallel interface. The result is extensive flexibility in graphic choices with an exceptionally quick time to first label printing.
Only the Features You Need

The GEMINI provides excellent print quality for an economical price by including only the features you really need. With a resolution of 203 dpi, a print speed up to 2" per second, and a print width up to 4.09" on media up to 4.5" wide, the GEMINI can fulfill many of your labeling requirements. Types of media include most direct thermal and thermal transfer label, tag and ticket materials on rolls up to 6" in diameter. The GEMINI supports all popular bar codes including UPC/EAN, Code 39, Code 128, and Interleaved 2 of 5 among others. The unique design of the GEMINI demonstrates the concept of doing more with less. It includes a modest 256KB memory, which provides more than enough processing capability. And, the GEMINI will not encounter a ROM shortage as other printers might due to space used by bar codes; with its unique design, the bar codes are stored in the driver program rather than in the printer. If your requirements include batch or demand operation, thermal transfer or direct thermal printing, or external rewind capability, the GEMINI will suit your needs.

Gemini Control Panel image

Windows Control Panel

What could be more convenient than to control the printer from your PC, instead of pressing buttons on the printer and trying to interpret brief status codes? Just click on the GEMINI icon in Windows to bring up the GEMINI Control Panel window. There is no need to reach over to the printer to find a pause or form feed button, because it is on your screen. When you need to check the printer's status, or find the number of labels waiting to be printed, or see a message explaining why the printer has stopped, all the information is conveniently available on your screen.
Windows + GEMINI = Bar Code Labeling Made Easy

GEMINI works with your Windows applications, is controlled from a window on your PC, and includes the features you need - no more and no less. For the Windows environment, GEMINI is the answer to your bar code labeling needs.

Printer Type:
Direct Thermal/Thermal Transfer
Printer Speed:
2" (50mm) - 2.8" (70mm) per second
203 dpi (8 dots/mm)
Bar Code Narrow Element:
5 mil minimum "X" dimension in picket fence or ladder orientations.
Print Width:
4.09" (104mm) max
Media Width:
4.5" (116mm) max
Print Length:
12" (300mm) max; .3" (8mm) min
Media Type:
Roll-fed, die-cut, continuous or fan-fold labels, tags or tickets; most direct thermal or thermal transfer materials
Media Thickness:
.0024" to .01" (.06 to .25mm)
Supply Roll:
6" (150mm) maximum diameter on cores from 1.5" to 3" (40mm to 75mm)
Media Sensing:
Fixed "see-through" photocell for die-cut labels at .8" (20mm) from label edge
1" (25mm) core diameter with 3" (75mm) outside diameter; 1182" (360 m) maximum length; industry standard widths
Present Sensor:
For on-demand label dispensing
Bar Codes (built into the driver):
Codabar, Code 128 A,B,C, Code 39, EAN/JAN-8, EAN/JAN-13, Interleaved 2 of 5, MSI, UCC, UPC-A, UPC-E0 & E1 and UPC/EAN Add On 2 & 5
All fonts available with Microsoft Windows
Font Expansion:
Dependent on font selected, as supported by Microsoft Windows
Character Set:
All character types supported by Microsoft Windows
Graphics Support:
All monochrome graphic types supported by Microsoft Windows
Label Rotation:
Portrait and Landscape, Reverse Portrait and Reverse Landscape
Control Panel:
Power switch with LED Power Indicator
Gemini Control Panel Application:
Provides on-screen buttons to control printer operation including Pause, Form Feed, Cancel, Printer Status, Firmware and Software Versions, Setup and Replace Printhead.
Internal RAM 256KB
Parallel - Centronics interface with transfer speed of 40KB /second
Power Source:
Available as 115 V 60 Hz or 230 V 50 Hz
1.6 AT (at 115V) or 800 mAT (at 230V)
Temp 50-95 (10-35 C) at 30-85% humidity
8.9"H x 9.4"W x 12.8"D (226H x 239W x 326D mm)
18 lbs (8 kg)
Agency Listings:
Built to TUV-GS and CE safety standards; complies with FCC Class A emissions standards; UL Approval pending

Stand-alone label creation software package for IBM-PC or compatibles running Microsoft Windows. Provides extensive, advanced label formatting functions.

Information in this document is subject to change without notice.

All brand or product names are trademarks or registered trademarks of their respective companies.

Part No.DescriptionList Price
10410Parallel Cable25.00
9008077Operator's Manual (Included No Charge) extra manuals50.00
9908082Maintenance ManualN/A
CABKITPrinter Repair Tool Kit410.00
CT40KPrinthead Cleaning Kits30.00
5905343Replacement Printhead350.00
GEMSC12 Month Service Contract299.00
GEMHS12 Month Hot Spare Contract598.00


Tharo Service Contracts are available for 12 month periods. They can be purchased when printers are originally purchased or at anytime during the standard factory warranty. The extended warranty period will begin when the factory warranty expires. Service contracts may also be purchased for units no longer under factory warranty; however, inspection of the unit at Tharo Systems, Inc. may be required. The original warranty period is for 1 year (365 days) from date of shipment by Tharo Systems. The Hot Spare contract includes the replacement of one (1) printhead per contract year. All prices are subject to change and are reflective of the cost of replacement parts. Inspection is required prior to the issue of a Service Contract if the warranty has expired.

Service Contracts cover all labor, material and surface transportation charges to return the product to customers within the 48 contiguous United States and District of Columbia. (Printhead warranty of 1 year (365 days) on original printhead applies to printers shipped after February 1, 1998. Otherwise, regular warranty of 6 months or 1,000,000 linear inches of use applies.) All shipping costs, custom clearances and other related charges outside this area are not covered by the Service Contract. Hot Spare Contract covers same day, overnight shipment of a replacement printer. (If notified no later than 11:30 AM EST.)

Prices F.O.B. Brunswick, Ohio. Prices subject to change without notice.