What Is a Can Sealer? How It Works and How to Choose One<\/title>\n <meta name=\"description\" content=\"Learn how a can sealer forms a double seam, compare manual and automatic machines, and check container fit, output, and seam quality before choosing.\">\n<\/head>\n<body>\n\n<div class=\"bd-post\">\n <style>\n @import url('https:\/\/fonts.googleapis.com\/css2?family=Roboto:wght@400;500;600;700&display=swap');\n\n .bd-post {\n \/* ===== \u54c1\u724c\u6807\u51c6\u5934 verbatim\uff08origin-design-levapack.md\uff09===== *\/\n font-family: \"Roboto\", -apple-system, BlinkMacSystemFont, \"Segoe UI\", \"Helvetica Neue\", sans-serif;\n font-size: 16px;\n font-weight: 400;\n line-height: 1.5;\n color: var(--text-secondary); \/* #7A7A7A \u2192 #666666\uff0cplan exception #2 (AA) *\/\n --prose-width: 740px;\n --gap-normal: 32px;\n --gap-section: 48px;\n --pad-standard: 24px;\n \/* ===== \u54c1\u724c palette tokens\uff08design-plan.md \u5355\u6e90\uff09===== *\/\n --body-bg: #FFFFFF;\n --text-primary: #161922;\n --text-secondary: #666666;\n --heading: #231815;\n --heading-sub: #161922;\n --link: #0F1C32;\n --accent: #3C6EC8;\n --accent-text: #2F5AA8;\n --card-fill: #F5F5F5;\n --card-border: #CCCCCC;\n --card-text: #161922;\n --card-text-2: #666666;\n --card-accent: #2F5AA8;\n --inverse-bg: #0F1C32;\n --inverse-text: #FFFFFF;\n --inverse-text-2: #CCCCCC;\n --inverse-accent: #FFAB00;\n --warning-text: #B45309;\n --btn-white: #FFFFFF;\n --btn-ink: #0F1C32;\n padding: 40px; 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}\n }\n <\/style>\n <article class=\"bd-post-article\">\n\n <p>A can sealer, also called a can seaming machine, attaches a compatible end (lid) to a can body. In most food and beverage cans, it forms a double seam: the end curl and body flange are folded together and compressed to make a hermetic closure. The closure helps prevent leakage and entry of contaminants, but it does not replace the processing and storage controls required for the product.<\/p>\n\n <figure class=\"bd-figure\">\n <div class=\"bd-figure-media\"><img loading=\"lazy\" src=\"https:\/\/www.levapack.com\/wp-content\/uploads\/2019\/12\/two-labeled-can-on-surface-edge.jpg\" alt=\"Two sealed metal cans displayed on a wooden case\" width=\"500\" height=\"333\" loading=\"lazy\" decoding=\"async\"><\/div>\n <figcaption>Examples of finished metal cans. Image source: Unsplash.<\/figcaption>\n <\/figure>\n\n <h2>What Does a Can Sealer Do?<\/h2>\n <p>The machine closes a filled can by forming a mechanical joint around its rim. A sealing compound inside the end curl helps fill small spaces within the finished seam. The can and end must be designed to work together; a well-adjusted machine cannot compensate for an incompatible or damaged container.<\/p>\n\n <div class=\"rich-callout bd-reveal\">\n <p class=\"rich-callout-text\"><strong>Can sealer, can seamer, or canning sealer?<\/strong> These names often refer to equipment that forms a double seam. Before selecting a machine, confirm the container, end, and closure method. A screw-capped container with an induction foil liner uses a different sealing process.<\/p>\n <\/div>\n\n <h2>How Does Double Seaming Work?<\/h2>\n <p>The can is supported on a lifter or base plate while a chuck holds the end in position. The first-operation roll turns the end curl around the body flange to form the cover hook and body hook. The second-operation roll compresses that interlock and distributes the sealing compound through the seam. A defect formed in the first operation cannot simply be corrected by tightening the second roll. The <a href=\"https:\/\/www.fda.gov\/inspections-compliance-enforcement-and-criminal-investigations\/inspection-guides\/guide-inspections-low-acid-canned-food-manufacturers-part-3\/\">FDA’s guide to metal-can closures<\/a> describes this sequence and the four components involved.<\/p>\n\n <figure class=\"bd-figure\">\n <div class=\"bd-figure-media\"><img loading=\"lazy\" src=\"https:\/\/www.levapack.com\/wp-content\/uploads\/2019\/12\/equipment-can-sealer-chuck-serrations-1.png\" alt=\"Close-up of a can seamer chuck holding the end during sealing\" width=\"500\" height=\"290\" loading=\"lazy\" decoding=\"async\"><\/div>\n <figcaption>Seamer chuck detail. Image source: Meats and Sausages.<\/figcaption>\n <\/figure>\n\n <div class=\"table-wrapper bd-reveal\">\n <p class=\"rich-table-title\">Main Parts of a Double-Seam Can Sealer<\/p>\n <table class=\"rich-table\">\n <thead><tr><th>Part<\/th><th>Role in the seam<\/th><\/tr><\/thead>\n <tbody>\n <tr><td>Seaming chuck<\/td><td>Supports the end while the rolls form the seam.<\/td><\/tr>\n <tr><td>Can lifter or base plate<\/td><td>Holds the can against the end and chuck.<\/td><\/tr>\n <tr><td>First-operation roll<\/td><td>Forms the initial interlock between end curl and body flange.<\/td><\/tr>\n <tr><td>Second-operation roll<\/td><td>Compresses and tightens the formed seam.<\/td><\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n\n <p>Some designs rotate the can against the rolls; others hold the can still while the rolls move around it. That choice affects handling, especially for products that may spill or shift, but both designs must form an acceptable seam for the specified can and end.<\/p>\n\n <h2>Manual, Semi-Automatic, and Automatic Can Sealers<\/h2>\n <p>The main difference between these types is how cans are loaded and moved through the sealing cycle. It is not a universal speed rating: actual output depends on the model, container format, operator tasks, and other equipment in the line.<\/p>\n\n <div class=\"table-wrapper bd-reveal\">\n <p class=\"rich-table-title\">Choose an Automation Level<\/p>\n <table class=\"rich-table\">\n <thead><tr><th>Type<\/th><th>How it operates<\/th><th>Typical fit<\/th><th>Check before buying<\/th><\/tr><\/thead>\n <tbody>\n <tr><td>Manual can sealer<\/td><td>An operator positions the can and operates the seaming mechanism by hand.<\/td><td>Trials, occasional use, and small batches.<\/td><td>Operator effort, compatible can sizes, tooling, and seam inspection method.<\/td><\/tr>\n <tr><td>Semi-automatic<\/td><td>An operator loads the can or end; the machine powers the seaming cycle.<\/td><td>Small production runs and frequent format changes.<\/td><td>Sustained output with manual loading and changeover requirements.<\/td><\/tr>\n <tr><td>Automatic<\/td><td>Cans are fed and seamed as part of an automated process.<\/td><td>Higher-volume or integrated packaging lines.<\/td><td>Output at the specified can size, line balance, footprint, and maintenance.<\/td><\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n\n <p>A manual can sealer still needs the correct chuck and rolls for its container. A powered tabletop machine is not necessarily manual simply because an operator loads each can. When comparing rated speeds, request a run using your can, end, and product, and measure the sustained output of the whole process.<\/p>\n\n <h2>Which Cans Can a Sealer Close?<\/h2>\n <p>Compatibility is determined by the can mouth and end as well as the body material. Metal cans are common, and some machines are configured for paper-composite or plastic-bodied cans with suitable ends. A machine’s advertised material range does not mean one set of tooling works for every container. Confirm the body and end specifications, diameter, height, chuck, rolls, and any change parts with the supplier.<\/p>\n <p>Double seaming should also be distinguished from induction sealing, which bonds a foil liner beneath a cap. The two methods use different closures and equipment. If the package has a screw cap or another non-seamed closure, describe that closure to the supplier before choosing a machine.<\/p>\n\n <figure class=\"bd-figure\">\n <div class=\"bd-figure-media\"><img loading=\"lazy\" src=\"https:\/\/www.levapack.com\/wp-content\/uploads\/2019\/12\/pile-up-of-Campbell-tomato-soup-cans.jpg\" alt=\"Stack of sealed food cans with metal ends\" width=\"500\" height=\"333\" loading=\"lazy\" decoding=\"async\"><\/div>\n <figcaption>Sealed food cans. Image source: Unsplash.<\/figcaption>\n <\/figure>\n\n <h2>How to Choose a Can Sealing Machine<\/h2>\n <p>Start with the package and product, then determine the machine configuration. These checks provide a useful specification for a supplier discussion:<\/p>\n\n <div class=\"rich-card bd-reveal\">\n <p class=\"rich-card-title\">Information to confirm with a supplier<\/p>\n <div class=\"rich-checklist-item\"><span><strong>Can and end:<\/strong> Send drawings or samples, including body material, end type, diameter, and height.<\/span><\/div>\n <div class=\"rich-checklist-item\"><span><strong>Required output:<\/strong> State the target cans per hour and available production hours; ask for a sustained sample-run result.<\/span><\/div>\n <div class=\"rich-checklist-item\"><span><strong>Product and process:<\/strong> Identify whether the product is dry, liquid, carbonated, or sensitive to oxygen, and whether a validated process follows sealing.<\/span><\/div>\n <div class=\"rich-checklist-item\"><span><strong>Format changes:<\/strong> Ask which chucks, rolls, guides, or settings change between can sizes.<\/span><\/div>\n <div class=\"rich-checklist-item\"><span><strong>Acceptance checks:<\/strong> Agree on sample cans, seam specifications, inspection records, and operator training.<\/span><\/div>\n <\/div>\n\n <p>Vacuum or nitrogen flushing may be useful where a product’s packaging specification calls for atmosphere control. The required residual-oxygen level must be established for that product and verified under the intended running conditions; there is no single target that fits every can. For foods requiring a scheduled preservation process, a hermetic seam or low-oxygen headspace alone does not establish shelf stability. Confirm container compatibility and the processing requirements with the relevant qualified specialists.<\/p>\n\n <h2>How Is Seam Quality Checked?<\/h2>\n <p>Visual defects such as false seams, droops, sharp seams, or damaged ends can indicate a closure problem. A trained inspector may also conduct a seam teardown and assess cover hook, body hook, seam thickness, width, overlap, and tightness against the specifications supplied for the can and end. Measurements alone do not establish that a seam is acceptable. The <a href=\"https:\/\/www.fda.gov\/inspections-compliance-enforcement-and-criminal-investigations\/inspection-guides\/guide-inspections-low-acid-canned-food-manufacturers-part-3\/\">FDA closure guide<\/a> explains the need for visual and teardown evaluation; <a href=\"https:\/\/industrialphysics.com\/knowledgebase\/articles\/can-seam-inspection-frequently-asked-questions\/\">Industrial Physics’s seam inspection FAQ<\/a> illustrates common measurements and defects.<\/p>\n <p>Set inspection frequency and corrective actions for the product, process, and applicable requirements. If an unacceptable seam is found, identify the affected production, investigate the can and machine conditions, and follow the site’s documented disposition procedure. Do not assume that one check per batch is sufficient or that a suspect can can be made safe by running it through the seamer again.<\/p>\n\n <p>For machine specifications and available configurations, see <a href=\"https:\/\/www.levapack.com\/can-sealing-machines\/\">Levapack’s can sealing machine range<\/a>.<\/p>\n\n <div class=\"bp-cta-end bd-reveal\">\n <p class=\"bp-cta-end-title\">Find a seamer for your can and product<\/p>\n <p class=\"bp-cta-end-sub\">Send us your can and end specifications, product type, and required output. We can discuss compatible configurations and sample-run checks.<\/p>\n <a class=\"bp-cta-end-btn\" href=\"https:\/\/www.levapack.com\/contact\/\" target=\"_self\">Discuss your application<\/a>\n <\/div>\n\n <h2>References<\/h2>\n <ol>\n <li>U.S. Food and Drug Administration. <a href=\"https:\/\/www.fda.gov\/inspections-compliance-enforcement-and-criminal-investigations\/inspection-guides\/guide-inspections-low-acid-canned-food-manufacturers-part-3\/\">Guide to Inspections of Low-Acid Canned Food Manufacturers: Part 3 \u2014 Container\/Closures<\/a>.<\/li>\n <li>Industrial Physics. <a href=\"https:\/\/industrialphysics.com\/knowledgebase\/articles\/can-seam-inspection-frequently-asked-questions\/\">Double Seam Inspection: Frequently Asked Questions<\/a>.<\/li>\n <\/ol>\n\n <\/article>\n<\/div>\n\n<\/body><\/html>\n\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>What Is a Can Sealer? How It Works and How to Choose One A can sealer, also called a can seaming machine, attaches a compatible end<span class=\"excerpt-hellip\"> [\u2026]<\/span><\/p>\n","protected":false},"author":1,"featured_media":562,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"none","_seopress_titles_title":"What Is a Can Sealer? Functions & Types | Levapack","_seopress_titles_desc":"Want to know more about can sealer machine? Learn about the components and types of can seaming machines by different functions and more.","_seopress_robots_index":"","footnotes":""},"categories":[181],"tags":[],"class_list":["post-557","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mml-blog"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.levapack.com\/ja\/wp-json\/wp\/v2\/posts\/557","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.levapack.com\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.levapack.com\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.levapack.com\/ja\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.levapack.com\/ja\/wp-json\/wp\/v2\/comments?post=557"}],"version-history":[{"count":39,"href":"https:\/\/www.levapack.com\/ja\/wp-json\/wp\/v2\/posts\/557\/revisions"}],"predecessor-version":[{"id":77483,"href":"https:\/\/www.levapack.com\/ja\/wp-json\/wp\/v2\/posts\/557\/revisions\/77483"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.levapack.com\/ja\/wp-json\/wp\/v2\/media\/562"}],"wp:attachment":[{"href":"https:\/\/www.levapack.com\/ja\/wp-json\/wp\/v2\/media?parent=557"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.levapack.com\/ja\/wp-json\/wp\/v2\/categories?post=557"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.levapack.com\/ja\/wp-json\/wp\/v2\/tags?post=557"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}

{"id":557,"date":"2019-12-06T06:37:42","date_gmt":"2019-12-06T06:37:42","guid":{"rendered":"https:\/\/www.levapack.com\/?p=557"},"modified":"2026-10-16T14:34:09","modified_gmt":"2026-10-16T06:34:09","slug":"%e7%bc%b6%e3%82%b7%e3%83%bc%e3%83%a9%e3%83%bc%e3%81%a8%e3%81%af","status":"publish","type":"post","link":"https:\/\/www.levapack.com\/ja\/what-is-a-can-sealer\/","title":{"rendered":"\u7f36\u30b7\u30fc\u30e9\u30fc\u3068\u305d\u306e\u6a5f\u80fd\u3068\u306f\uff1f"},"content":{"rendered":"\n\n\n \n \n What Is a Can Sealer? How It Works and How to Choose One<\/title>\n <meta name=\"description\" content=\"Learn how a can sealer forms a double seam, compare manual and automatic machines, and check container fit, output, and seam quality before choosing.\">\n<\/head>\n<body>\n\n<div class=\"bd-post\">\n <style>\n @import url('https:\/\/fonts.googleapis.com\/css2?family=Roboto:wght@400;500;600;700&display=swap');\n\n .bd-post {\n \/* ===== \u54c1\u724c\u6807\u51c6\u5934 verbatim\uff08origin-design-levapack.md\uff09===== *\/\n font-family: \"Roboto\", -apple-system, BlinkMacSystemFont, \"Segoe UI\", \"Helvetica Neue\", sans-serif;\n font-size: 16px;\n font-weight: 400;\n line-height: 1.5;\n color: var(--text-secondary); \/* #7A7A7A \u2192 #666666\uff0cplan exception #2 (AA) *\/\n --prose-width: 740px;\n --gap-normal: 32px;\n --gap-section: 48px;\n --pad-standard: 24px;\n \/* ===== \u54c1\u724c palette tokens\uff08design-plan.md \u5355\u6e90\uff09===== *\/\n --body-bg: #FFFFFF;\n --text-primary: #161922;\n --text-secondary: #666666;\n --heading: #231815;\n --heading-sub: #161922;\n --link: #0F1C32;\n --accent: #3C6EC8;\n --accent-text: #2F5AA8;\n --card-fill: #F5F5F5;\n --card-border: #CCCCCC;\n --card-text: #161922;\n --card-text-2: #666666;\n --card-accent: #2F5AA8;\n --inverse-bg: #0F1C32;\n --inverse-text: #FFFFFF;\n --inverse-text-2: #CCCCCC;\n --inverse-accent: #FFAB00;\n --warning-text: #B45309;\n --btn-white: #FFFFFF;\n --btn-ink: #0F1C32;\n padding: 40px; 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}\n }\n <\/style>\n <article class=\"bd-post-article\">\n\n <p>A can sealer, also called a can seaming machine, attaches a compatible end (lid) to a can body. In most food and beverage cans, it forms a double seam: the end curl and body flange are folded together and compressed to make a hermetic closure. The closure helps prevent leakage and entry of contaminants, but it does not replace the processing and storage controls required for the product.<\/p>\n\n <figure class=\"bd-figure\">\n <div class=\"bd-figure-media\"><img loading=\"lazy\" src=\"https:\/\/www.levapack.com\/wp-content\/uploads\/2019\/12\/two-labeled-can-on-surface-edge.jpg\" alt=\"Two sealed metal cans displayed on a wooden case\" width=\"500\" height=\"333\" loading=\"lazy\" decoding=\"async\"><\/div>\n <figcaption>Examples of finished metal cans. Image source: Unsplash.<\/figcaption>\n <\/figure>\n\n <h2>What Does a Can Sealer Do?<\/h2>\n <p>The machine closes a filled can by forming a mechanical joint around its rim. A sealing compound inside the end curl helps fill small spaces within the finished seam. The can and end must be designed to work together; a well-adjusted machine cannot compensate for an incompatible or damaged container.<\/p>\n\n <div class=\"rich-callout bd-reveal\">\n <p class=\"rich-callout-text\"><strong>Can sealer, can seamer, or canning sealer?<\/strong> These names often refer to equipment that forms a double seam. Before selecting a machine, confirm the container, end, and closure method. A screw-capped container with an induction foil liner uses a different sealing process.<\/p>\n <\/div>\n\n <h2>How Does Double Seaming Work?<\/h2>\n <p>The can is supported on a lifter or base plate while a chuck holds the end in position. The first-operation roll turns the end curl around the body flange to form the cover hook and body hook. The second-operation roll compresses that interlock and distributes the sealing compound through the seam. A defect formed in the first operation cannot simply be corrected by tightening the second roll. The <a href=\"https:\/\/www.fda.gov\/inspections-compliance-enforcement-and-criminal-investigations\/inspection-guides\/guide-inspections-low-acid-canned-food-manufacturers-part-3\/\">FDA’s guide to metal-can closures<\/a> describes this sequence and the four components involved.<\/p>\n\n <figure class=\"bd-figure\">\n <div class=\"bd-figure-media\"><img loading=\"lazy\" src=\"https:\/\/www.levapack.com\/wp-content\/uploads\/2019\/12\/equipment-can-sealer-chuck-serrations-1.png\" alt=\"Close-up of a can seamer chuck holding the end during sealing\" width=\"500\" height=\"290\" loading=\"lazy\" decoding=\"async\"><\/div>\n <figcaption>Seamer chuck detail. Image source: Meats and Sausages.<\/figcaption>\n <\/figure>\n\n <div class=\"table-wrapper bd-reveal\">\n <p class=\"rich-table-title\">Main Parts of a Double-Seam Can Sealer<\/p>\n <table class=\"rich-table\">\n <thead><tr><th>Part<\/th><th>Role in the seam<\/th><\/tr><\/thead>\n <tbody>\n <tr><td>Seaming chuck<\/td><td>Supports the end while the rolls form the seam.<\/td><\/tr>\n <tr><td>Can lifter or base plate<\/td><td>Holds the can against the end and chuck.<\/td><\/tr>\n <tr><td>First-operation roll<\/td><td>Forms the initial interlock between end curl and body flange.<\/td><\/tr>\n <tr><td>Second-operation roll<\/td><td>Compresses and tightens the formed seam.<\/td><\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n\n <p>Some designs rotate the can against the rolls; others hold the can still while the rolls move around it. That choice affects handling, especially for products that may spill or shift, but both designs must form an acceptable seam for the specified can and end.<\/p>\n\n <h2>Manual, Semi-Automatic, and Automatic Can Sealers<\/h2>\n <p>The main difference between these types is how cans are loaded and moved through the sealing cycle. It is not a universal speed rating: actual output depends on the model, container format, operator tasks, and other equipment in the line.<\/p>\n\n <div class=\"table-wrapper bd-reveal\">\n <p class=\"rich-table-title\">Choose an Automation Level<\/p>\n <table class=\"rich-table\">\n <thead><tr><th>Type<\/th><th>How it operates<\/th><th>Typical fit<\/th><th>Check before buying<\/th><\/tr><\/thead>\n <tbody>\n <tr><td>Manual can sealer<\/td><td>An operator positions the can and operates the seaming mechanism by hand.<\/td><td>Trials, occasional use, and small batches.<\/td><td>Operator effort, compatible can sizes, tooling, and seam inspection method.<\/td><\/tr>\n <tr><td>Semi-automatic<\/td><td>An operator loads the can or end; the machine powers the seaming cycle.<\/td><td>Small production runs and frequent format changes.<\/td><td>Sustained output with manual loading and changeover requirements.<\/td><\/tr>\n <tr><td>Automatic<\/td><td>Cans are fed and seamed as part of an automated process.<\/td><td>Higher-volume or integrated packaging lines.<\/td><td>Output at the specified can size, line balance, footprint, and maintenance.<\/td><\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n\n <p>A manual can sealer still needs the correct chuck and rolls for its container. A powered tabletop machine is not necessarily manual simply because an operator loads each can. When comparing rated speeds, request a run using your can, end, and product, and measure the sustained output of the whole process.<\/p>\n\n <h2>Which Cans Can a Sealer Close?<\/h2>\n <p>Compatibility is determined by the can mouth and end as well as the body material. Metal cans are common, and some machines are configured for paper-composite or plastic-bodied cans with suitable ends. A machine’s advertised material range does not mean one set of tooling works for every container. Confirm the body and end specifications, diameter, height, chuck, rolls, and any change parts with the supplier.<\/p>\n <p>Double seaming should also be distinguished from induction sealing, which bonds a foil liner beneath a cap. The two methods use different closures and equipment. If the package has a screw cap or another non-seamed closure, describe that closure to the supplier before choosing a machine.<\/p>\n\n <figure class=\"bd-figure\">\n <div class=\"bd-figure-media\"><img loading=\"lazy\" src=\"https:\/\/www.levapack.com\/wp-content\/uploads\/2019\/12\/pile-up-of-Campbell-tomato-soup-cans.jpg\" alt=\"Stack of sealed food cans with metal ends\" width=\"500\" height=\"333\" loading=\"lazy\" decoding=\"async\"><\/div>\n <figcaption>Sealed food cans. Image source: Unsplash.<\/figcaption>\n <\/figure>\n\n <h2>How to Choose a Can Sealing Machine<\/h2>\n <p>Start with the package and product, then determine the machine configuration. These checks provide a useful specification for a supplier discussion:<\/p>\n\n <div class=\"rich-card bd-reveal\">\n <p class=\"rich-card-title\">Information to confirm with a supplier<\/p>\n <div class=\"rich-checklist-item\"><span><strong>Can and end:<\/strong> Send drawings or samples, including body material, end type, diameter, and height.<\/span><\/div>\n <div class=\"rich-checklist-item\"><span><strong>Required output:<\/strong> State the target cans per hour and available production hours; ask for a sustained sample-run result.<\/span><\/div>\n <div class=\"rich-checklist-item\"><span><strong>Product and process:<\/strong> Identify whether the product is dry, liquid, carbonated, or sensitive to oxygen, and whether a validated process follows sealing.<\/span><\/div>\n <div class=\"rich-checklist-item\"><span><strong>Format changes:<\/strong> Ask which chucks, rolls, guides, or settings change between can sizes.<\/span><\/div>\n <div class=\"rich-checklist-item\"><span><strong>Acceptance checks:<\/strong> Agree on sample cans, seam specifications, inspection records, and operator training.<\/span><\/div>\n <\/div>\n\n <p>Vacuum or nitrogen flushing may be useful where a product’s packaging specification calls for atmosphere control. The required residual-oxygen level must be established for that product and verified under the intended running conditions; there is no single target that fits every can. For foods requiring a scheduled preservation process, a hermetic seam or low-oxygen headspace alone does not establish shelf stability. Confirm container compatibility and the processing requirements with the relevant qualified specialists.<\/p>\n\n <h2>How Is Seam Quality Checked?<\/h2>\n <p>Visual defects such as false seams, droops, sharp seams, or damaged ends can indicate a closure problem. A trained inspector may also conduct a seam teardown and assess cover hook, body hook, seam thickness, width, overlap, and tightness against the specifications supplied for the can and end. Measurements alone do not establish that a seam is acceptable. The <a href=\"https:\/\/www.fda.gov\/inspections-compliance-enforcement-and-criminal-investigations\/inspection-guides\/guide-inspections-low-acid-canned-food-manufacturers-part-3\/\">FDA closure guide<\/a> explains the need for visual and teardown evaluation; <a href=\"https:\/\/industrialphysics.com\/knowledgebase\/articles\/can-seam-inspection-frequently-asked-questions\/\">Industrial Physics’s seam inspection FAQ<\/a> illustrates common measurements and defects.<\/p>\n <p>Set inspection frequency and corrective actions for the product, process, and applicable requirements. If an unacceptable seam is found, identify the affected production, investigate the can and machine conditions, and follow the site’s documented disposition procedure. Do not assume that one check per batch is sufficient or that a suspect can can be made safe by running it through the seamer again.<\/p>\n\n <p>For machine specifications and available configurations, see <a href=\"https:\/\/www.levapack.com\/can-sealing-machines\/\">Levapack’s can sealing machine range<\/a>.<\/p>\n\n <div class=\"bp-cta-end bd-reveal\">\n <p class=\"bp-cta-end-title\">Find a seamer for your can and product<\/p>\n <p class=\"bp-cta-end-sub\">Send us your can and end specifications, product type, and required output. We can discuss compatible configurations and sample-run checks.<\/p>\n <a class=\"bp-cta-end-btn\" href=\"https:\/\/www.levapack.com\/contact\/\" target=\"_self\">Discuss your application<\/a>\n <\/div>\n\n <h2>References<\/h2>\n <ol>\n <li>U.S. Food and Drug Administration. <a href=\"https:\/\/www.fda.gov\/inspections-compliance-enforcement-and-criminal-investigations\/inspection-guides\/guide-inspections-low-acid-canned-food-manufacturers-part-3\/\">Guide to Inspections of Low-Acid Canned Food Manufacturers: Part 3 \u2014 Container\/Closures<\/a>.<\/li>\n <li>Industrial Physics. <a href=\"https:\/\/industrialphysics.com\/knowledgebase\/articles\/can-seam-inspection-frequently-asked-questions\/\">Double Seam Inspection: Frequently Asked Questions<\/a>.<\/li>\n <\/ol>\n\n <\/article>\n<\/div>\n\n<\/body><\/html>\n\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>What Is a Can Sealer? How It Works and How to Choose One A can sealer, also called a can seaming machine, attaches a compatible end<span class=\"excerpt-hellip\"> [\u2026]<\/span><\/p>\n","protected":false},"author":1,"featured_media":562,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"none","_seopress_titles_title":"What Is a Can Sealer? Functions & Types | Levapack","_seopress_titles_desc":"Want to know more about can sealer machine? Learn about the components and types of can seaming machines by different functions and more.","_seopress_robots_index":"","footnotes":""},"categories":[181],"tags":[],"class_list":["post-557","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mml-blog"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.levapack.com\/ja\/wp-json\/wp\/v2\/posts\/557","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.levapack.com\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.levapack.com\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.levapack.com\/ja\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.levapack.com\/ja\/wp-json\/wp\/v2\/comments?post=557"}],"version-history":[{"count":39,"href":"https:\/\/www.levapack.com\/ja\/wp-json\/wp\/v2\/posts\/557\/revisions"}],"predecessor-version":[{"id":77483,"href":"https:\/\/www.levapack.com\/ja\/wp-json\/wp\/v2\/posts\/557\/revisions\/77483"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.levapack.com\/ja\/wp-json\/wp\/v2\/media\/562"}],"wp:attachment":[{"href":"https:\/\/www.levapack.com\/ja\/wp-json\/wp\/v2\/media?parent=557"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.levapack.com\/ja\/wp-json\/wp\/v2\/categories?post=557"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.levapack.com\/ja\/wp-json\/wp\/v2\/tags?post=557"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}