Glass Handling Assembly Stabilizing Thin Sheets
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Solution Overview
Problem
Thin glass sheets used in photovoltaic devices are fragile and prone to breakage during the application of strips due to the mechanical forces exerted by conventional dispensing heads, which increases the risk of breakage during the fabrication process.
Innovation Solution
A glass handling assembly that includes conveyor rollers and crowder rollers to stabilize the glass sheet, with the crowder rollers having a noncylindrical surface to counteract upward forces and maintain the sheet in a planar condition, and support rollers to provide additional counteracting forces, ensuring the sheet remains flat and secure during strip application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional dispensing heads are used to apply strips to glass sheets, then strip application can be performed, but the glass sheets are subjected to opposing forces and bending forces that increase the risk of breakage
Solution Approach 1:
The patent introduces support rollers that provide counteracting forces to balance the downward pressure from the dispensing head. These support rollers are positioned to contact the glass sheet and apply upward force, creating a counterweight effect that prevents excessive bending and reduces breakage risk while allowing strip application to proceed
Solution Approach 2:
The support rollers act as intermediary elements between the glass sheet and the dispensing head. Rather than allowing the dispensing head to directly press against the glass sheet, the support rollers mediate the interaction by providing distributed support and reducing point loads, thereby protecting the fragile glass while enabling the strip application process
2Loss of substance
If glass sheets are made thinner to save material costs and improve transmissibility, then material efficiency and optical performance improve, but the glass sheets become more fragile and prone to breakage
Solution Approach 1:
The patent implements support rollers positioned beforehand in the processing path to provide cushioning support to thin glass sheets before they encounter the dispensing head. This preemptive support system is specifically designed to accommodate and protect the reduced strength of thinner glass while enabling the fabrication process to proceed
3Manufacturing precision
If dispensing heads push down onto glass sheet surfaces during strip application, then strip placement is controlled, but the glass sheets are subjected to opposing forces that create bending and increase breakage risk
Solution Approach 1:
The patent segments the force application by introducing multiple support rollers distributed along the glass sheet path. Rather than having a single point of contact or support, the system divides the support function across multiple rollers, which distributes the opposing forces and reduces bending moments on the glass sheet while maintaining strip placement precision
Data Source
AI summary
Assemblies are provided for stabilizing sheets of glass during handling. The assemblies may include rollers of different varieties for stabilization. Crowder rollers may be provided to contact edges of the sheets. One or more of the crowder rollers may have an outer surface having a noncylindrical portion with an increasing diameter in an upward direction relative to the conveyance plane of the sheets. Conveyor rollers may be arranged so as to define a conveyor for conveying the sheets. One or more of the conveyor rollers may be a support roller in substantial registration with a strip applicator for contacting a bottom side of the sheets below the strip applicator during application of a strip.