Printing Plate Picking With Vacuum Cups and Parallel Paper Removal
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Solution Overview
Problem
Conventional printing plate handling systems face challenges in automating the simultaneous and efficient removal of interspersed sheets of paper from printing plates without damaging the delicate surfaces, leading to system throughput issues and increased footprint requirements.
Innovation Solution
A mechanism that moves both printing plates and interspersed sheets of paper in a substantially parallel manner by vertically aligning an array of plate cassettes, using a plate picker and paper picker unit with vacuum cups to lift and convey plates to an imaging device while disposing of papers into a bin, minimizing vertical space and optimizing horizontal alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional sequential picking and removal steps are used to remove printing plates and sheets of paper, then the delicate plate surfaces are protected from damage, but the overall system throughput times are adversely affected
Solution Approach 1:
The system divides the picking function into two separate picking mechanisms: a first picking mechanism for plates and a second picking mechanism for sheets of paper. This segmentation allows simultaneous operation of both mechanisms, enabling parallel processing of plates and papers without compromising the protective function for either component.
Solution Approach 2:
The first picking mechanism picks the printing plate from the plate stack in advance before the sheet of paper is removed by the second picking mechanism. This preliminary action ensures the plate is secured and protected during the subsequent paper removal process, maintaining plate surface protection while enabling parallel operations that improve throughput.
2Ease of manufacture
If sheets of paper are removed and conveyed to containers in conventional systems, then paper disposal is achieved, but the reliability and throughput of the media handling system are adversely affected and the footprint is increased
Solution Approach 1:
The second picking mechanism extracts sheets of paper from between the printing plates in the plate stack and conveys them directly to a paper disposal unit. This extraction function is separated from the plate handling process, allowing independent optimization of paper disposal without impacting plate handling throughput or requiring additional intermediate containers.
3Productivity
If multiple picking mechanisms operate in parallel to improve throughput, then system productivity increases, but the device complexity increases
Solution Approach 1:
Both the first picking mechanism and the second picking mechanism are designed with similar structural components and operational principles, allowing them to perform different functions (plate picking and paper picking) using comparable mechanical designs. This universality reduces overall system complexity by reusing proven design patterns rather than developing entirely different mechanisms for each function.
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
Enhances system throughput by simultaneously handling plates and papers without damaging the plates, reducing the vertical footprint, and optimizing space utilization.
Implementation Method 1
a first picking mechanism including a first set of vacuum cups adapted to contact and hold a printing plate
Implementation Method 2
a second picking mechanism including a second set of vacuum cups adapted to contact and hold the sheet of paper
Data Source
AI summary
A printing plate picking mechanism includes a plate cassette stacking mechanism having an array of plate cassettes, each plate cassette adapted to hold a plurality of printing plates separated by intervening sheets of paper. A plate cassette movement mechanism is adapted to move a selected plate cassette to a printing plate loading position. A plate picker is adapted to contact and hold the leading edge of the topmost printing plate and transport it to plate transport pinch rollers. A paper picking unit includes a paper picker adapted to contact and hold a leading edge of a topmost sheet of paper in the selected plate cassette, and a plate guide positioned above the paper picker to guide the printing plate held by said plate picker. A vertical alignment system is adapted to vertically align the plate picker and the paper picking unit with the selected plate cassette.