About Us

Engineering-based solutions provider with over 50 years of manufacturing and design experience

Our Company

Gemstar® Protective Hard Cases is an engineering-based solutions provider with over 55 years of manufacturing experience and protective packaging knowledge. We are a family-owned business supported internally by long-term employees, and we have a firm history rooted in custom, made-to-order-manufacturing and the dedication of a customer-centric organization.

Mission Statement

To provide “purpose built, designed from the inside out” cases that are durable, engineered solutions. Utilizing the processes of injection molding, rotational molding, thermoforming, cold-form bending, and secondary fabrication, our products are produced to the highest standards of quality and are made in the USA by Gemstar people.

gemstar manufacturing campus

Gemstar's manufacturing facilities are located at the headquarters of its parent company, Gemini, Inc., in Cannon Falls, MN.


  • Customer Focus:  Convenient, hassle-free customer service with top quality and industry-leading guarantee
  • Respect:  A culture of integrity and humility.  Treating others as we wish to be treated ourselves
  • Stability:  Reliability for our customers and our people through growth and investment in people and equipment
  • Honesty:  Be authentic, genuine, and transparent in our interactions with each other and our customers
  • Curiosity:  Seeking new, innovative, and diverse perspectives in a culture of continuous improvement
  • Teamwork:  We all have a passion to win – but in the end we win or lose together
  • Stewardship:  Supporting our industry, our local communities, and the environment
  • 1964


    Our founder, Jim Weinel, a NASA lamination materials engineer, purchased two vacuum formers and leased a small manufacturing space in St. Louis Park, MN. The first products manufactured were custom parts components for signs, packaging, and consumer and industrial products. Jim and his wife, Sharon, named the company Gemini after the newest NASA space program “Gemini.”

  • 1968


    An electrical fire ravaged our plant, destroying equipment, raw materials, and finished products. This would have been the end, but Jim and his team started rebuilding, determined to reestablish and expand.

  • Kary_Kase


    Gemini makes thermoformed cases with new machinery and technology as an extension of its custom plastic parts. Kary Kases, the first official case line, debuts, and company sales hit $1,000,000 for the first time.

  • Gemini_Cases1


    Kary Kases are sold under the Kase/Specialty Products division of Gemini, alongside the company’s growing Letters division. Gemini builds its first manufacturing headquarters in the small town of Cannon Falls, MN. Along with the relocation is an effort to reduce reliance on external suppliers by becoming more vertically integrated. Gemini is now poised for expansion with the ability to supply custom manufacturing solutions for a growing customer base.

  • Gemini_Cases2


    The Kary Kase line was originally a standard line of products with customization options for specific customers. Over time, more and more customers sought a custom solution, and custom cases soon outsold standard cases. Gemini further expands manufacturing capabilities with a new rotational molding process, enabling the company to serve new markets with a more rugged and robust case platform.

  • GEMSTAR_Cases


    Gemini invests in injection molding equipment to replace vacuum-formed shells. This additional manufacturing capability makes creating a new line of lightweight, airtight cases possible, and the first fully injection molded case is introduced, the “Gemstar.”

  • GEMSTAR Manufacturing1


    Gemini’s Case division becomes “Gemstar” and soon becomes a separate company named Gemstar Manufacturing. Soon after, a need arises in the industry for a supplier of highly engineered, customer-centric cases. Gemstar Manufacturing takes on the challenge to manufacture cases to fill this niche.

  • GemstarMfg_brands


    Parent company Gemini continues to invest in Gemstar Manufacturing with new state-of-the-art manufacturing technology and excellent customization capabilities. Gemstar launches its three brands for its three manufacturing platforms: VersaPro®, SENTINEL®, and STRONGHOLD®.

  • Gemstar Product Intro_final.00_01_28_08.Still003


    To this point, the majority of our product performance validation was outsourced to local test labs. With more and more custom solutions going through the shop, there was an increased request from customers for us to assist in formal product testing. In support of our continued effort to vertically integrate our capabilities and to increase speed-to-market for not only our expanding lines of cases but also for our customer-specific case designs, we developed our own in-house test lab. Our equipment allows us to test to a wide variety of industry standards for materials and reusable packaging performance.

  • created by dji camera


    A new 40,000 square foot facility is built for Gemstar Manufacturing on the Gemini campus in Cannon Falls, Minnesota. This addition provides the company with increased space for rotational molding and the production and assembly of cases and custom plastic parts.

  • Gemstar Product Intro_final.00_01_22_05.Still004


    A dedicated world-class testing and resource center is created on the Gemini campus in Cannon Falls, Minnesota. Testing services in the new center include drop testing, immersion, UV chamber, salt fog chamber, vibration, lateral impact, temperature, and other customized testing.

  • Robomold


    Gemini continues to invest in leading-edge technology with the addition of Robomold™ robotic rotational molding. Gemstar Manufacturing is now the only case manufacturer in the U.S. with four platforms to produce high-performance packaging cases. Like Rotational Molding, Robomold produces rugged double-walled cases for Gemstar’s Stronghold product line.

Guaranteed for Life.

Gemstar offers the highest quality and lifetime guarantee. No matter the environment or application, we stand behind all of our case products. Gemstar is able to offer this warranty because we work with premium materials, use the best process for your application, and help you through design to manufacture to assure the best overall solution

Start Your Career at Gemstar.

Gemstar is an industry leader in the industrial plastic cases market. We proudly offer a competitive salary structure with a wide array of benefits including medical and dental insurance, paid vacation, and more.

Let’s talk about your case requirements.

Get in touch to start your protective hard case project today.