The print head is not complex, the printer companies just make it out to be. Essentially it’s just a funnel to transfer ink onto paper. All that’s needed is a needle to deliver the ink to the paper, or puncture the top layer to inject the ink to it. Apply heat to set the ink afterward. Moving the head over the paper and moving the rollers for the paper to move is already software which is known to the 3d printing community. The big trick is finding a system which doesn’t hit some backward patent and getting a prototype made. That largely takes time and money.
Most modern printers aren’t what you describe though, they’re either a piezo that flexes with electricity to create pressure on the ink chamber and release a precise droplet of ink or they are a thermal design where a resistor heats inside the ink chamber to create pressure that forces ink out of the nozzle and subsequently draws more ink into the chamber as it cools. Heat is used here to eject the ink but heat is not used to set the ink in either process, that is done with evaporation and absorption (which is why printing a full page image can smear).
It’s not some big secret as you’ve said, the patents are openly available, but as you’ve said they’re off limits even for noncommercial use because America is stupid. It’s true that they’re not mystical and impossible to recreate but they’re definitely harder to replicate than a heat sink with a tube cut in it, a heat break, a cartridge heater, and a metal nozzle with a (typically) 0.4mm hole
The print head in most inkjet printers (at least non commercial ones) has no moving parts (unless you count the piezo flexing). Dot matrix used needles but why recreate that unless you specifically want that for the vibes or something?
Don’t overengineer the prototype. Make it simple and efficient as a jumping off platform to lead to further developments down the road. Any open printer project doesn’t have to start with the technology the proprietary models have. They just have to be proof-of-concept that it’s doable. Once that’s proven, further developments can be made down the line. Dot matrix is easy to create and cheap to produce compared to the overengineered systems proprietary models use nowadays and it would work as a stepping stone toward that further development.
That makes sense. If you’re going that route though you should be fairly safe patent wise I would think? Most of the dot matrix patents, if not all, have to be expired by now?
You would still need to explore patents. Just because patents exist, doesn’t mean they are in use. I would not be surprised to find out that a company like HP would hunt down and buy any patents that could interfere with its profits just to prevent others from using them.
The print head is not complex, the printer companies just make it out to be. Essentially it’s just a funnel to transfer ink onto paper. All that’s needed is a needle to deliver the ink to the paper, or puncture the top layer to inject the ink to it. Apply heat to set the ink afterward. Moving the head over the paper and moving the rollers for the paper to move is already software which is known to the 3d printing community. The big trick is finding a system which doesn’t hit some backward patent and getting a prototype made. That largely takes time and money.
Most modern printers aren’t what you describe though, they’re either a piezo that flexes with electricity to create pressure on the ink chamber and release a precise droplet of ink or they are a thermal design where a resistor heats inside the ink chamber to create pressure that forces ink out of the nozzle and subsequently draws more ink into the chamber as it cools. Heat is used here to eject the ink but heat is not used to set the ink in either process, that is done with evaporation and absorption (which is why printing a full page image can smear).
It’s not some big secret as you’ve said, the patents are openly available, but as you’ve said they’re off limits even for noncommercial use because America is stupid. It’s true that they’re not mystical and impossible to recreate but they’re definitely harder to replicate than a heat sink with a tube cut in it, a heat break, a cartridge heater, and a metal nozzle with a (typically) 0.4mm hole
The print head in most inkjet printers (at least non commercial ones) has no moving parts (unless you count the piezo flexing). Dot matrix used needles but why recreate that unless you specifically want that for the vibes or something?
Don’t overengineer the prototype. Make it simple and efficient as a jumping off platform to lead to further developments down the road. Any open printer project doesn’t have to start with the technology the proprietary models have. They just have to be proof-of-concept that it’s doable. Once that’s proven, further developments can be made down the line. Dot matrix is easy to create and cheap to produce compared to the overengineered systems proprietary models use nowadays and it would work as a stepping stone toward that further development.
That makes sense. If you’re going that route though you should be fairly safe patent wise I would think? Most of the dot matrix patents, if not all, have to be expired by now?
I’m not a lawyer, but I would expect so.
You would still need to explore patents. Just because patents exist, doesn’t mean they are in use. I would not be surprised to find out that a company like HP would hunt down and buy any patents that could interfere with its profits just to prevent others from using them.
Why would you need to worry about patents on something that is free and open source
Patent infringement is about use, not price
It’s total bullshit that stifles innovation but such is life in the USA. At least the period isn’t completely obscene like copyright