Remote Ink Supply via Mechanical Pump and Check Valves
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Solution Overview
Problem
Users of inkjet printers are frequently dissatisfied with the limited ink volume in traditional cartridges, leading to frequent replacements.
Innovation Solution
A printing system that connects to remote ink sources via mechanically engaged connecting heads with pumps, check valves, and flexible conduits, allowing for continuous ink supply and detection of out-of-ink conditions to alert users.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If traditional ink cartridges are used with limited volume, then the printer housing remains compact and simple, but the ink supply duration is short requiring frequent replacements
Solution Approach 1:
The ink supply system is divided into separate functional modules: a remote ink source, connecting conduits, a pump mechanism, and the printhead. This segmentation allows the ink reservoir to be positioned remotely while maintaining a compact printer housing, thereby extending ink supply duration without proportionally increasing overall system complexity.
Solution Approach 2:
A pump mechanism acts as an intermediary between the remote ink source and the printhead, actively transporting ink through flexible conduits. This intermediary component enables the system to overcome the limitations of passive ink flow, allowing for larger ink volumes to be supplied without requiring the entire reservoir to be housed within the printer.
2Quantity of substance
If remote ink sources with larger volume are used, then ink supply duration is extended, but the system complexity increases with additional components
Solution Approach 1:
The ink reservoir is extracted from the printer housing and positioned remotely, connected via flexible conduits. This extraction allows the printer to access large ink volumes without accommodating the entire reservoir within its compact housing, thereby increasing ink quantity while minimizing the impact on system complexity.
Solution Approach 2:
The ink supply system transitions from a two-dimensional arrangement (cartridge within housing) to a three-dimensional configuration with spatial separation between the ink source and printer. The flexible conduits enable this dimensional transition, allowing large ink volumes to be supplied from remote locations without proportionally increasing the printer's footprint or internal complexity.
3Adaptability or versatility
If flexible conduits are used to connect remote ink sources, then ink flow flexibility is improved, but the risk of leakage and backflow increases
Solution Approach 1:
The system incorporates check valves that convert the potential harm of backflow into a controlled one-way flow mechanism. These valves allow ink to flow freely in the forward direction while automatically preventing backflow, thereby maintaining the flexibility benefits of flexible conduits while eliminating their primary disadvantage regarding leakage and reverse flow.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables a larger ink supply, reducing the frequency of replacements and ensuring uninterrupted printing operations by providing a continuous ink flow mechanism and user notifications for ink depletion.
Implementation Method 1
Each pump serves to drive the flow of an ink from one of the remote sources through connecting conduits to a printhead of the printer
Implementation Method 2
an actuator configured to provide force pulses to the diaphragm of the pump
Implementation Method 3
Check valves prevent the backflow of ink from the printer to corresponding remote sources
Data Source
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AI summary
Apparatus and methods are provided. A supply of ink within a flexible bag is located apart from a printer. A fluid conduit couples the supply of ink to the printer by way of a connecting head. The connecting head includes a pump driven by a mechanical actuator of the printer. Operation of the pump causes a flow of ink from the flexible bag to a printhead of the printer. Pump failure is detected and interpreted as an out-of-ink condition, and user notification and/or cessation of printing operations are automatically performed.