Here, I am starting a small (and unofficial) chronical of the Duplicating Products Machines produced by 3M.
It's my intent to overview some of those machines for posterity, from the view of people who dealt with them. I'm one of those people, so you will be hearing from me, for now.
3M assigned a sequential internal numerical model number for each machine. Then, the marketing department of each manufacturing division assigned a sales name
(often a number-name) to it for field use.
I will begin by listing some of them, then I will attempt to write a short essay about some of them.
Model Name/# Description
12 ??? First commercially available Thermo-Fax machine?
17 Thermo-Fax Secretary First really popular Thermo-Fax copier, used the carrier belt
19 ??? Flat bed Thermo-Fax copier
20 Thermo-Fax "14" 14 inch wide Thermo-Fax copier, the earliest model.
22 Thermo-Fax Secretary Completely redesigned Secretary Copier with fewer motors
22C Thermo-Fax Secretary Same as the 22, but with a front mounted temperature meter.
26 ??? Copier that used a huge "flash"
31 Encore Automatic Semi Automatic A and B paper (Q system?) Duplicator
44 Secretary??? Redsigned 22 with temperature meter integrated with speed control so operator could match speed with temperature as the machine warmed up.
45A Secretary???? Heavily redesigned 44 with gold reflector; LAST use of "Friction Wheel" drive system!!!
45B Secretary??? Upgrade of 45A, with first use of transistors/PCBoard
45C Secretary??? Upgrade of 45B, streamlined a little.
47 ??? Looked just like the 45 Secretary, but the lamp stayed on, IIRC. Was used for A and B paper statements
48A Companion Beginning of the "Dual Spectrum" Copy system. This machine was a Dry Photo
Exposure Unit. Originally designed to be used with the Model 44
Thermofax Secretary for development of the image by sandwiching an
exposed intermediate with a piece of copy paper(in a carrier)
and then passing it through the Thermofax machine for development.
At first it used 606 transparent pink intermediate paper/657 white copy
paper. Later used 655 intermediate (translucent, pink, but like tissue paper) and 657 white copy paper
48B Dry Photo Exposure Unit This exposure unit plugged into the front of the 64A or 64B developer unit
50 Thermofax Major Wide carriage, 14 inches?
57 209 Automatic Dry Photo Copier Used the exposure film intermediate roll as a carrier for the 658 copy paper
64AG/64BG Dry Photo Developer Unit Combined with the 48, you had a complete "Dual Spectrum" Dry Photo copier
107 Dry Photo Manual Copier Not sure if this combination had its own model number(48 + 64) Used 655/657 papers?
74 A-09 Adherography Duplicator First machine to use a "toner", I think.
76A,B,CG Dry Photo copier Intergration of exposure and development units into one nice package
191/207/215/369/839 ??? VQC Copiers These were the "Pressure roll" or "Crush Roll" Copiers
235 VHS Copier First toner-using automatic copier
238 VHS-R Copier Very much Updated 235
609 Automatic Dry Photo Copier An upgrade of the Model 57, the "209"
??? Color in Color Copier C-in-C The first full color copier, introduced in 1968. A direct electrostatic process coupled with a thermal dye transfer system.
400 & 800 Linolex Word Processor
777/787/848 Secretary III Copier
??? 6740 Copier Purchased from SCM, mfr'd by VanDyk Research Corp (67 copies/min., 40 sizes)
??? 400, 450, 600, 800 Olivetti Electronic Typewriters
I know I'm missing many of them, but I will be adding additional machines as I get information about them.
If you'd like to contribute an article about any one of these machines, please use the contact link at the top of this page to let me know.