27
2021
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02
How to improve the production rate of composite bags
This article explores the patent landscape surrounding zippers, a common household item. You might assume zippers were initially designed for their current applications, but that wasn't the case. As the saying goes, where there's demand, there's a market; and innovation wins the market. Take zippers, for example. Before their invention, connecting two edges typically involved: (1) Buttons: Chinese button knots are still practical, and some clothing still uses them. (2) Laces: Iconic laces and bows. (3) Hook and Loop Fasteners: Unfortunately, I couldn't find an image; imagine a hook and loop working together. So, what would these methods look like on boots, especially the tall boots popular when zippers were in their infancy? Imagine replacing the zippers in the image above with buttons. Considering the less refined and durable buttons of that era, a pair of tall boots might have 20 or more buttons. Putting them on or taking them off might take 30 minutes each (for those with slow hands or less dexterity)... This is the environment in which zippers developed. Research reveals multiple claims regarding the origin (inventor) of the zipper. However, the earliest zipper-related patent I could find is: Those with mechanical knowledge might recognize the structural features of the diagram. However, the key point is the patent application date: August 27, 1914 – quite early! The second question is: how many zipper-related patents exist today? Using Baitian's patent search engine with the keyword "zipper", I found: Disregarding whether all patents relate to zipper structures (some might cover manufacturing processes), the image shows 5159 authorized and valid patents related to zippers. What does this mean? If you want to start a zipper manufacturing, business, or sales company, you must ensure your product's structure is either existing technology or entirely innovative, exceeding existing technology and patents. Otherwise, you risk receiving a notice of patent infringement (though the likelihood is low, the risk exists). I lack the resources to examine all 5000+ valid patents; those interested can explore further. This search is limited to domestic patents and uses the simple keyword "zipper." Zippers are also called "zipper locks," but "zipper" is more common. Internationally, even the Japanese term, when translated, isn't "zipper" but "clamp," which is quite puzzling. A complete search would require considering broader concepts like "sliding fasteners" and "tightening devices." This might yield a more comprehensive result. Please point out any omissions. This and future content aim to promote and popularize patents. Feel free to discuss further if you're interested. Any similarities are purely coincidental.
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After printing, lamination, and curing, the composite bag finally reaches the bag-making stage. However, some problems due to design flaws become apparent: images or text may be cut off, seams may be poorly aligned, or colors may be misaligned. Discovering these issues at this stage causes significant losses for the company and prevents improvements in production efficiency.
In fact, these problems can be entirely prevented during the design phase.
1. Images and text on the layout of food packaging bag designs must have a 1cm margin from the cutting edge to prevent them from being cut off. Text must be converted to curves or outlined. Do not use system fonts, as this may result in white nodes at intersecting strokes. After converting text to curves, check for line breaks or overlapping misalignment between characters or lines. Do not use overprinting for black text.
2. The colors in food packaging bag designs cannot be based on screen or printer colors. Clients must refer to the CMYK color spectrum percentages when choosing printing colors. Note: CMYK color spectrums from different manufacturers vary due to materials, ink types, printing pressure, etc., resulting in differences in the same color block.
3. For the same food packaging bag design, there will be color variations between different batches. A color difference within 10% is considered normal (due to variations in ink control). If an old design needs to be reprinted, to prevent excessive color differences, only the digital color samples provided by our company should be used as a reference. Color differences between different print runs cannot be used as a reason for returns.
4. Completed food packaging bag design drafts do not need crosshairs or cutting lines. Two invisible frames can be used to represent the production dimensions and bleed lines. For example, if the design is 92mm × 56mm, the cut size will be 90mm × 54mm (1mm bleed on each side). If special dimensions are required, they should be specified in the order and uploaded documents.
5. The color value of the background or background image in food packaging bag designs should not be less than 10% to ensure that it is visible in the printed product.
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