Card Dot Printing Positioning Mechanism
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Solution Overview
Problem
Existing dot printing methods for cards, such as credit and smart cards, face challenges in precisely positioning the cards within the printer, leading to inconsistent printing results due to the lack of a simple and efficient mechanism for aligning the cards with the printing station.
Innovation Solution
A dot printer design that includes a support carriage with a plate-like element and an abutment structure, utilizing rollers and guide plates to precisely position the card on the carriage, ensuring accurate alignment with the printing station, and a suction system to secure the card without interference from ink, allowing for borderless printing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a complex positioning mechanism is used to precisely position the card, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The positioning mechanism is divided into separate functional elements: guide plates that define card insertion orientation, abutment surfaces that stop card movement at precise locations, and suction elements that secure the card. Each element performs a specific positioning function independently, achieving high precision without requiring a complex integrated system.
Solution Approach 2:
The card itself is used as part of the positioning system. The card's physical dimensions and features (such as its corners or edges) directly engage with the guide plates and abutment surfaces, allowing the card to self-position without requiring additional active positioning components.
2Device complexity
If the printer structure is simplified to reduce dimensions, then device complexity is reduced, but manufacturing precision deteriorates
Solution Approach 1:
The guide plates and abutment structures serve multiple functions: they guide card insertion, position the card precisely, and provide reference surfaces for the printing operation. This multi-functionality eliminates the need for separate dedicated positioning components, simplifying the overall structure while maintaining precision.
Solution Approach 2:
The suction system acts as an intermediary that secures the card to the support carriage without requiring mechanical clamps or complex fastening mechanisms. This allows precise positioning to be maintained while using simpler holding structures.
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
The method enables precise and efficient positioning of cards for dot printing, ensuring accurate ink placement and reducing the complexity and size of the printer, resulting in improved printing quality and efficiency.
Implementation Method 1
a suction system to secure the card without interference from ink
Data Source
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AI summary
Method for dot printing on cards comprising: providing a storage zone wherein cards to be printed are stored; activating an extraction station (20) for extracting a card (11) from the storage zone, the card having a main side; arranging the extracted card on a support carriage (40), that includes a plate-like element (48) that has a main edge (48a); performing a main movement of the carriage (40) for bringing the card to a printing station (50); activating the printing station for dot printing on the card. Placing the card on the carriage comprises: providing an abutment element (90); providing an abutment structure (100), comprising: a first abutment portion that defines a first abutment surface (Al) for the card; a second abutment portion (120) that defines a second abutment surface (A2) for the carriage. The first abutment surface (Al) is offset from the second abutment surface (A2) by a first distance (d1). The method further comprises: placing the carriage at a first position (PI), in which it is interposed between an output (20a) of the extraction station (20) and the abutment element, (90) and in which the main edge has a second distance (d2) from the second abutment portion (120) larger than the first distance (d1) placing the card (11) on the plate-like element (48) so that the card extends partly beyond the main edge and the main side (11a) has a third distance (d3) from the main edge (48a) that is larger than the first distance (d1); moving the card in a first direction (XI) so as to impinge onto the abutment element (90); performing a first movement, in a second direction (X2) transverse to the first direction (X1), of the carriage toward the abutment structure, so that: first the main side (11a) of the card impinges on the first abutment portion (100) and stops at the first abutment surface (Al), and then the main edge (48a) of the plate-like element impinges on the second abutment portion (120) and reaches the second abutment surface (A2).